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Threads are listed newest first in each of these Categories:
 0.Choosing a Finish: Corrosion. Compatibility
 1.Preparation: a. Mechanical Prep b. Chemical Pretreatments c. Masking & Racking
 2.Inorganic Finishing: a. Stainless & Titanium b. Anodizing & Light Metals c. Electroplating & Electroforming
d. Electroless Plating e. PVD, Vacuum Processes f. Galvanizing, Hot Dipping
g. Black Oxide, Bluing h. Other Inorganic Processes
 3.Organic Finishing: a. CED, Electrocoat b. Powder Coating c. Lacquers, Clearcoats
d. Painting, Printing, Adhesives
 4.Post-treatments: a. Chemical Post-treatments b. Baking & Drying c. Stripping, Reworks, etc.
 5.Supporting Issues: a. Analysis, Lab, QA/QC b. Water & Wastewater c. Safety, Emissions, Toxicity
d. Plant/Process Engineering e. Specs, Books, Stats f. World Wide Word Of The Week
g. Mostly metallurgy h. Precious Metal Recovery
 6. Non-industrial: a. Artists, Hobbyists, DIY b. Research, Thesis work c. K-12 Science
 7. Not Metal Finishing: Off Topic, but Interesting

For 2 weeks RFQs are reserved for Advertisers and colored Red.
If no advertiser responds in 2 weeks the RFQs are colored Green and Open To All.


Brass plating on stainless steel surgical instruments (December 1)

Hard Chrome Plating vs. Flame Spray (November 15)

Stainless or zinc plated screws better for aluminum solar collectors? (October 26)

Need gold plating directly on titanium (October 12)

Need high resistivity biocompatible plating on nichrome (October 10)

Convert anodizing line to another process (September 29)

7882-1i Acid resistant coating for aluminum (September 9)

61313-1i Powder Coating tiny blades for fishing lures (August 25)

Chrome vs. Powder Coating of Motorcycle rims (July 24)

Need scratch resistant, conductive, black coating on copper strip (July 5)



Superfinishing Stainless Steel (December 2)

Formula for polishing and buffing compounds (November 22)

Vibratory burnishing compound formulation open Q. (November 11)

Rz to Ra conversion (October 22) open Q.

Polishing Intricate Stainless Steel Spheres and Concave Mirrors (September 28) open Q.

Need mirror finish on Socket & Philips screws (August 29)

Polishing copper and brass (August 25)

What media will allow tumble finishing in 30 minutes? (August 15)

Sand blasting standards: Swedish SA 1, SA 2, SA 2.5, SA 3 vs. NACE & SSPC (August 1)

RMS vs Ra (July 9) open Q.

Maximum groove depth in nickel plating with diamond cutting (July 5)


How to make 3-in-1 Phosphating Chemical? open Q. (November 30)

How to clean aluminium hollow rivets (November 30)

Loss of weight in acid pickling (October 27)

61342i Black stripe on cleaned and annealed cold rolled coils (October 12)

How to make phosphating solution (September 27)

Problems and solutions in zinc phosphating (September 27)

Black Oxide vs Phosphate (September 18)

Powdered metal parts rusting after pickling process (September 16)

Chemical & Electropolishing of Brass RFQ Thane India (September 15)

Electroplating without acid pickling (September 14)

Degreasing copper cylinders for chrome plating (August 21)


Protecting mother of pearl during gold plating open Q. (November 19)

Masking instruction and training open Q. (November 15)

Need masking help for anodizing (September 25)



1265-2b Anodizing of titanium: Type II alkaline has blue splotches (December 2)

Passivating stainless steel before gold plating (December 2)

AMS2488 Type II on Titanium: maximum touch-up area? (November 20)

Stains after Stainless Steel Passivation, Rinsing Requirements (November 9)

Passivation of Titanium Medical Implants (November 9)

61345i Cloudiness on Type III Anodized Titanium Med Screws (October 24)

Problems & Solutions in Passivation of Titanium (October 22)

Stainless steel etching -- How To (October 15)

Electrochemical Weld Cleaning on 316L Stainless Steel (September 24)

Anodizing titanium with trisodium phosphate (TSP) (September 24)

Passivation of 303SS with Nitric Acid Q&A, Problems & Solutions (September 20)

2629i Problems electropolishing stainless castings (August 30)

Electropolishing small 4xx / 400 series stainless steel parts (August 15) open Q.

5422-5i Electropolishing of stainless steel -- Q&A, Problems & solutions (August 13)

Stainless steel laser etch and passivating (August 9)

Electropolish, Passivate, or Chemical Polish 4140 & 4340 Steel? (July 30)

56202i Stainless steel passivation color inconsistent (July 30)


61302-3i Anodizing is splotchy grey, not black (November 30)

Two-color anodizing (November 30)

Switching to Aluminum Gravure Cylinders (November 28)

Type 2-1/2 & Room Temperature Hardcoat Anodizing (November 27)

Need Gold Color Hard Anodize (November 24)

Anodizing A380 vs. A360 (November 22)

Nickel free cold sealing process for anodized aluminum open Q. (November 21)

Lines appear in aluminium extrusions open Q. (November 21)

Aluminium gate manufacturer wants to pretreat before powder coating

White spots in black anodizing (November 12)

Re-anodizing Aluminum without enlarging holes (November 5)

Excess Sludge Buildup in Acid Etching of Aluminum (October 29) open Q.

54981i Wrong finished color for MIL-A-8625 Type III anodize on 7075-T6 (October 21)

61330i Aluminum corrosion after stripping the anodizing (October 15) vipInquirer often helps others, so especially deserves our help

Anodizing a Weldment of Different Aluminum Alloys (October 15)

Temperature limit for chromate conversion coating on aluminum (October 11) open Q.

Where to get glass coated abrasive paper?RFQ Denmark (October 11) vipInquirer often helps others, so especially deserves our help

Big pits on big panels in boric-sulfuric acid anodizing open Q. (October 8)

61335-1i Anodizing problem on AA 5052 Alloy (October 7) open Q.

Plating onto Aluminium without zincate or stannate (October 4)

58771i2 White corrosion spots/pits on chromated aluminum after 1-2 months (September 29)

Plating or Anodizing of Aluminum Gears (September 28) open Q.

44778-5i Hard Anodize Type 6061 Aluminum: stains (September 27)

53350-1i Film on anodized parts: is black dye tank contaminated? (September 27)

Chemical conversion coating on top of anodizing (September 27)

Nitric acid drag-in to dye/seal tank (September 27)

Dyed Anodizing Color Matching Q&A, Problems & Solutions (September 27)

Alodine, Iridite, Chem-film not sticking / rubbing off (September 27)

Silver Plating on Aluminum: Blister / Bubble Problems (September 25) open Q.

Only one of the parts on the rack Hard Anodizes (September 24) open Q.

32830i Crazing/Cracking problem in anodizing (September 22) open Q.

What hardness/abrasion resistance from anodizing? (September 16) open Q.

Most practical method to use PTFE to coat hard anodized aluminum parts? (September 15)

Mixing two different part sizes in the anodizing bath (September 13)

Sulfuric Acid Anodize: Cl, F, Sulfide Limits (September 9)

61312i White powder on anodized finish (September 7)

1495-1i Zincating on Aluminum: Problems with 6000 series (September 6) open Q.

61311i Anodizing 0.003" 5052 aluminum? RFQ Palmdale CA (September 6)

How to Chromate Conversion Coat ADC12 Aluminum (September 5) open Q.

61299i White dots on an anodised finish (August 23) open Q.

Thermal conductivity of conversion coatings on aluminum (August 20)

Anodising rectifier and power requirements (August 10) open Q.

Can RoHS Yellow Chromate Survive 168 Hour Salt Spray? (August 9)

Problems with Color of Hardcoat Anodize (August 7)

How to anodize 6061 T6 aluminum and what do I need? (August 7) open Q.

Iridite 17P and RoHS compliant alternates? (August 5) open Q.

How to eliminate anodizing appearance variations (August 5)

Anodizing on 7000/7XXX aluminum is chipping at edges (August 5)

Burning problem in Hard Anodizing of Aluminum (August 4)

Electrical resistance of Class 3 chromate conversion coating (August 4)

61295i Can't get proper black color on hardcoat anodizing (August 3)

Nickel Plating on Aluminum Adhesion Problem (July 30) open Q.

Metallic Contaminants in Sulfuric Acid Anodizing Bath (July 26)

Special light & glasses to reveal whether aluminum is anodized (July 24) open Q.

Alodine is not properly coating some aluminum alloys (July 22) open Q.

De-smutting/De-Oxidizing of aluminum (July 21)

Acid vs. Alkaline Etch before Chromic Acid Anodizing vipInquirer often helps others, so especially deserves our help (July 19)

Anodized aluminum is inadvertently scrubbing N2O gas (July 13) open Q.

Minimum anodizing thickness for good dark black? (July 13) open Q.

Horizontal anodizing of aluminum sheets (July 10)

Aluminum Anodizing flakes off when heated to 125 °C (July 7) open Q.

Black spots in anodized aluminum profile (July 2) open Q.

Anodized surface is powdery (July 2)   


Plating glass-to-metal seals open Q. (December 2)

Does Boric acid affect hardness of Nickel Plating (December 2)

Reducing iron contamination in a hard chrome plating bath (December 2)

Remove sodium metabisulfite from Nickel Plating bath open Q. (December 2)

Acid Zinc / Potassium Zinc Chloride Plating: Problems & Solutions open Q. (December 1)

15007-1i Problem of white spots after Zinc Plating (November 28)

Need to do Zinc Plating on Stainless Steel (November 23)

Need zinc plating service RFQ Texas (November 23)

Activating carbon steel for chrome plating (November 22)

11835-1i Design of anodes for hard chrome plating (November 20)

Zinc plating blisters on brazed and oil-quenched component open Q. (November 16)

51586-1i Maclee brighteners for tin plating open Q. (November 16)

Non-cyanide copper strike/plating process (November 16)

Needed: Plating Company to Chrome Plate to QQ-302B TY I CLASS I RFQ Scottsdale, AZ (November 14)

Can Magnetic Jigs/Racks be used for Hard Chrome Plating? open Q. (November 14)

Nickel Sulfamate Plating is Peeling from Copper (November 10)

Anode fabrication for hard chrome plating open Q. (November 9)

Zinc Plating with Blue Chromate is turning pink & yellow (November 3)

HCl causes parts to blister open Q. (September 24)

Pulse Plating Settings for PCB/PWB? open Q. (October 26)

Alkaline non-cyanide gold flash bath contamination (October 26) open Q.

Unplated area inside blind holes is rusting (October 22)

Granules form when acid copper plating? (October 22)

55350-1i Hexavalent chromate is okay, trivalent gets white rust and black spots in 96 hours (October 19)

Can we improve our tin plating Salt Spray results? (October 19) open Q.

Nickel plating anticipated salt spray test hours (October 18) open Q.

What should be exact distance from hard chrome anode to cathode? (October 12) open Q.

Maximum allowable thickness of nickel plate under silver plating (October 11) open Q.

zinc plating Zinc plating defects (Quality of metal finishing) (October 10)

5135i Pitting & Bubbles in Hard Chrome Plating (October 9) open Q.

Problems with tin plating over copper or brass (October 9) open Q.

Need Decorative Nickel Plating for Microphone Bodies RFQ Nashville TN (October 8)

Metal plating of babbitting (October 5) open Q.

Our copper plating anodes are turning black (September 30) open Q.

Conductivity of the zinc plating with chromate conversion coating (September 29) open Q.

Want more brightness & hardness, and better LCD coverage, in HEEF-25 Chrome Plating (September 29) open Q.

23685i Rose gold plating is rusting (September 27) open Q. 2nd Rqst

44771i2 Acid Copper Plating Problems (September 25)

Differences between chloride (acid) and alkaline zinc plating (September 25)

Nickel plating plus rhodium as substitute for silver plating (September 23) open Q.

28851-5i Very early rusting of zinc-nickel plated screws (September 23) open Q.

Need tin plating on 100 aluminum chain saw pistonsRFQ WA Australia (September 21)

Cyanide copper solutions temperature and anodes (September 19)

4925-1i Hard chrome plating troubleshooting (September 18) open Q.

Hard Chrome Plating on Hydraulic Cylinders Scratched by Seals (September 18) open Q.

Need Plating onto Tungsten Powder RFQ Cohasset MA (September 15)

Need brass plating on aluminum frames RFQ Overland Park KS (September 14)

Nickel striking of stainless steel (September 9) open Q.

Black spots on brass and copper plating (September 6) open Q.

54204i Soft chrome under hard chrome plating for salt spray resistance (August 30)

61306-1i Zinc plating problem (August 29)

Silver plating over aluminum for PIM (Passive Intermodulation) avoidance (August 19)

33774-2i Vermeil jewelry is tarnishing (August 12)

Tin Plating Problem (August 12)

How to plate copper wire with lead (August 7) open Q.

Electroforming onto silicone forms RFQ Woodland CA (August 6)

Hard Chrome plating of zinc die castings (August 5) open Q.

Chrome Plating Problems on Gravure Printing Cylinders/Rolls (August 5)

How to "Distress" Chrome Plating RFQ Cambridge UK (August 2)

Reducing chloride concentration in acid copper bath (July 30) open Q.

Titanium-Cadmium Plating Q&As (July 27)

Alkaline Zinc Plating Q&A's, Problem: White Patches After Chromating (July 19) open Q.

Cadmium Plating Is Peeling from Nickel Plating (July 18) open Q.

Potassium Chloride Shortage for Zinc Plating Is there an alternative? (July 18) open Q.

Tin plating anode problems (July 16) open Q.

Tin plating discolors (turns yellow) (July 16) open Q.

Zinc-Iron Plating with Trivalent Chromate fails 240-hour salt spray (July 15) open Q.

Zinc plating failing 48-hour salt spray? (July 12)

Bleed-out from seams after zinc plating (July 9) open Q.

34107i Zinc-plating appearance problems (July 5)

Conductivity of Zinc-Nickel Plating & Chromating (July 5) open Q.

Troubles with rose gold plating (July 4) open Q.



Etching of ABS for Electroplating with chromic-sulphuric acid open Q. (November 9)

15045-1i Electroless Nickel Plating on Leaded Steel Alloys open Q. (November 8)

61339i Electroless nickel plating testing with UAN solution (October 14)

Electrical conduction properties of electroless nickel plating (October 14) open Q.

Sodium Hypophosphite alternate chemical? (October 5) open Q.

Screen printing onto Electroless nickel Plating (September 27)

Electroless nickel to prevent high temperature oxidation of copper (September 18) open Q.

Factors affecting Electroless Nickel deposit rate (September 6)

How to determine plating defect vs. plastic substrate defect (August 28)

Palladium activation for EN Problems & Solutions RFQ Mumbai India (August 17)

Can Electroless Nickel Plating be Machined? (July 18) open Q.

Formula for electroless nickel plating solution (July 2) open Q.


DC Charge lost during PVD TiAIN Coating. Effect? open Q. (November 20)

How to get Aurora Borealis effect on crystal beads? (October 27) open Q.

Aluminum PVD on PC Temperature Endurance (October 2) open Q.

PVD coatings: color control Q&A's (September 18) open Q.

Coating & Finishing of Titanium for Biomedical (August 21) open Q.

PVD gold color control and matching Q&A's, Problems & Solutions (August 14)

Vacuum Cad plating adhesion problem on 13-8 stainless (July 17) open Q.


Aluminum sticking to zinc coated plates stored in warehouse (December 1)

Galvanizing flux bath has iron contamination open Q. (November 21)

Want to know reasons for PIT MARKS on galvanized sheet open Q. (November 13)

How to calculate/measure the thickness of zinc coatings (November 5)

56867i Spotting, Staining, Blackening of Hot Dip Galvanized Finish (November 5)

Minimize/maximize spangle in hot dip galvanizing open Q. (November 4)

Zinc coating on GI wire cracks when we making gabion box (October 25) open Q.

Rough & lumpy low quality galvanizing (October 15) open Q.

Aluminium addition to Galvanising Kettle (October 10) open Q.

GP concertina wire rusts only when sent to some cities (October 10) open Q.

Risk to galvanizing kettle from low zinc level? (September 28)

61324-1i White patches on new hot dip galvanized poles (September 23)

61316-1i Hot-Dip Tinning Problem: Crystals in molten tin tank (September 13) open Q.

61293i Chrome-free galvanized pipe gets black spots (August 23)

44978i Galvanizing kettle furnace and burner design (August 21)

39461i Black spot problem on hot dip galvanized mesh (August 18)

Chemical to Remove slag/dross of zinc from hot dip galvanizing (August 10)

Excessive generation of dross in zinc kettle startup (August 10)

Is yellowish/green dichromate appearance on galvanizing a process defect? (August 10)

61296i Get zinc out of 5000 lb mold after cooling (August 10)

61283i Finish on zinc coated steel coil for prefabricated housing (July 2) open Q.

Pimples on hot dip galvanizing (July 2)


Black Oxide process problems open Q. (November 13)

Black oxidation layer went off after shooting test (August 5) open Q.

Testing the quality of blackening coating (July 16)

2h. OTHER INORGANIC FINISHING: Mechanical Plating, QPQ, Metal Spray, Zinc-rich Dip-Spin Coatings, Sherardizing, etc.

Porcelain enamel surface prep (November 30)

Need moly-coat (MoS2) dri-film coating RFQ Somerset Kentucky (November 24)

Dacromet coating questions (July 23) open Q.



Misc. problems in CED (cathodic electrodeposition) coating (September 26) open Q.

Foaming in phosphate tank causes CED defects (August 10)

Emissivity of e-coating vs. powder coating (August 8)

Pin holes in CED e-coating (July 4) open Q.


61362-1i Need to reduce Power bill for infrared oven (December 1)

"Flame" Powder Coating Systems open Q. (November 15)

2368i Powder coating on zinc die-castings (November 12)

Powder coated steel is blistering (November 7)

Powder coating without baking (November 5)

Is Conductive Filler Needed before Powder Coating (October 31)

Powdercoating stainless steel Q&A's, Problems and Solutions (October 12) open Q.

Touching up powder coating (August 10)

Mixing powder coating colors to get a new color (August 10)

Alternatives to powder coating (July 27) open Q.


Clear coats for brass plating on stainless steel (November 4)

Coatings for metal spectacle frames (August 30)


Paint Viscosity Chart / Cross-reference of Ford cups to Zahn cups (November 22)

Poor adhesion between epoxy primer and urethane top coat (October 6) open Q.

Fire and vandal-resistant coatings for rolling stock (September 20) open Q.

Seeking Rainbow Coating on Fish Hooks (September 15) open Q.

Candy apple coating for brushed steel (August 26) open Q.

15909i Training on plastisol chemistry and application? open Q. (July 7)



Are yellow chromate and yellow passivate the same? (November 5)

Conductivity of olive drab chromate on cadmium (September 22) open Q.

20303i White colored spots on chromated zinc plating (July 23)


26353-1i Cleaning gold burned in soldering (November 11)

What if we bake for hydrogen embrittlement relief at 300 °C? (October 2)

Standards for Hydrogen Embrittlement Relief after Zinc-Nickel Plating (September 6) open Q.

Soldering issue when using a Silver-bearing Soldering Alloy (July 9) open Q.


Need titanium nitride PVD coating stripped from my watch RFQ Vancouver, BC (November 23)

How to remove teflon coating from aluminum molds open Q. (November 19)

3212-1i Stripping Cadmium plating and choosing a method (November 12)

What chemicals or processes are used to Strip gold plating? (November 9)

Avoiding Powder Coating Buildup on Hooks, Racks, Carts & Fixtures? (October 24) open Q.

Stripping Silver Plating from brass (musical instruments, etc.) (September 25)

Stripping aluminum with caustic soda (July 27) open Q.

Removal of tin plating from copper (July 14) open Q.



Titration for Sulphuric Acid in Anodizing Bath open Q. (November 30)

Measure nickel plating thickness under silver plating (November 11)

Determining Sulfuric Acid Percentage in Anodizing Tank open Q. (November 9)

Is Ferroxyl testing for porosity applicable for chrome on nickel alloys? open Q. (November 3)

Analysis of soft gold plating bath, removing contaminants (October 26) open Q.

How to make 0.1N sulfuric acid (October 14)

Cyanide Brass/Copper plating Solution Analysis (October 11)

61338i Q-Panel Envelopes...Where to buy them? (October 10) open Q.

Determine % Nitric Acid. Titration? Conversion factor? (October 8)

Salt Spray Test -- ASTM B117 Operational Problems (October 4)

Titrimetric/spectrographic method for iron & copper in chrome bath (September 29) open Q.

How to measure amount of Gold used and left in the plating bath? open Q. (September 28)

Procedure for chromic acid and sulphate determination (September 24) open Q.

Converting Baumé to Concentration (September 9)

Soak Cleaner / Degreaser: Alkalinity test & oil content (September 2) open Q.

Gravimetric analysis of gold plating bath (August 29)

Electrical Resistance Testing of MIL DTL-5541 Chromate (August 26) open Q.

4408i How to Analyze/Titrate a Hardcoat Anodizing Tank (August 20) open Q.

Caustic Etch Analysis -- aluminium anodizing (August 14)

Converting percent by volume to oz/gal (August 9)

How to test hard chrome without copper sulphate (July 19) open Q.

Guidelines & best practices for purchasing a salt spray chamber (July 13) open Q.

Dubpernell test method for chromium plating (July 10) open Q.

Determination of sulfuric acid in chromium bath (July 5) open Q.

Correlation between accelerated weathering & natural weathering (July 1) open Q.


Recover/recycle aluminum from etching & anodizing open Q. (November 21)

Separating coconut oil from saponified liquid open Q. (November 12)

Recovery of tin from waste plating solutions (September 30) open Q.

Wastewater Treatment: Sulphate Removal from Anodizing Wastewater (September 24) open Q.

Floating Sludge Problem in Wastewater Treatment (September 24) open Q.

Wastewater Flow Meter Needed (August 2) open Q.

Chromium in my Anodizing Waste? (July 18)

Ion Exchange / DM plant calculations (July 13) open Q.


Copper Sulphate as Swimming Pool Algae Remedy? open Q. (December 2)

Respirator recommendation for acid copper plating (November 19)

How poisonous is Potassium gold cyanide? (October 2)

Danger from galvanized planting boxes? (September 18) open Q.

What happens when one inhales sulfamic acid dust? (September 13) open Q.

Stainless pot left on the burner; are the fumes dangerous? (September 7)

Does drinking milk really help with metal fume fever? (August 29) open Q.

How toxic is chrome plating on my faucet (August 2)


Calculating cooling needed for aluminum anodizing open Q. (December 3)

Starting an auto body acid dip company open Q. (November 30)

Aluminum corrosion by DI water (November 15)

Q&A on corrosion-resistant Pump Shaft materials open Q. (November 12)

Cleaning dummy cathode plates for re-use open Q. (November 4)

How to sell a Plating company in these environmental times (October 29)

Buffer pads for McClary Easy Polisher Scrubber RFQ Ontario (October 19)

Hard chrome plating: Amperage increases although Voltage is constant (October 18) open Q.

Linear Positioning Systems for Programmed Hoists (October 11)

Separate nitric acid from mixture of nitric & sulphuric acid (October 10) open Q.

Is filtration required for acid zinc plating? (October 10) open Q.

Acid etch (ammonium bifluoride) solids handling RFQ Toronto (October 9)

Copper Plating Issue: Uneven distribution (September 29) open Q.

M.O.C. for nitric-sulfuric tank for stripping silver (August 19) open Q.

Chrome plating mist /fume control (August 12) open Q.

Hard anodizing chiller sizing for 5-gallon tank (July 30)

Nickel Sulfamate Plating ventilation & safety issues (July 23)

Tank material for hard chrome plating (July 9)


RoHS compliance when electrocleaning after chrome plating (November 20)

Q&A's about MIL-STD-171 (November 15)

REACH Regulations Affecting the Plating and Metal Finishing Industry (October 21)

Can I do MIL-DTL-16232 phosphatizing on galvanized items? (October 15) open Q.

Penetrant inspection per ASTM E-1417 (October 6) open Q. 2nd Request

Good Reference Books for Electroplating (September 21)

Meanings of plating spec abbreviation: MFZnIII (August 31) open Q.

Is touching up anodized with Alodine/Iridite/Chem-film/Chromate allowed? (August 18)

Industry specs for powder coating thickness (July 29) open Q.

Silver Plating is Blistering. Interpreting AMS 2411 Requirements (July 21)

NADCAP & NADCAP Audits (July 20) open Q.

5f. W...W...W...WORD OF THE WEEK

"Eurado" metal finish on 1937 radio (November 16)

What is Continuous Gold Plating (July 2) open Q.

5g. MOSTLY METALLURGY; Heat Treatment

Titanium vs. steel Samurai Swords (October 27) open Q.

How to reach very high hardness for 410SS? (October 27)

Must copper wire be annealed for drawing? (October 14) open Q.

Need copper masking & carburizing RFQ Chennai India (October 4)

How to anneal mild steel (September 18) open Q.

Cast Aluminum Cookware: What Alloy is Best? (August 26) open Q.

Post treatment of steel after quenching process (August 14) open Q.

Inconel 718 turns black during pickling only if heat treated (August 5) open Q.

How to separate copper from silver (July 13) open Q.


Is this ore/rock Platinum, Palladium & Rhodium? (November 30) open Q.

Finding the purity of silver in silver alloys (October 16) open Q.

Want to sell a 4-pound chunk of 20% iridium (September 22) open Q.

Cleaning gold that has been burned (August 29)

Recycler asks about extracting silver with steel nails and salt? (August 29)

34676i Best and Easiest way to refine gold dust to get 99.9% purity (August 29)

Problems in recovering gold from soil (August 28)

Separation of Gold metal from Immersion Gold Solution (August 23) open Q.

How much gold in a pound of computer memory sticks (August 12) open Q.



Need Teflon re-coating services for pots & pans (November 30)

How to paint or restore chrome table legs open Q. (November 27)

0085-6i Problems & solutions in copper electroforming (November 24)

0757-2i Restoring an old National Cash Register open Q. (November 23)

Electroforming on black kyanite isn't adhering (November 22)

Coatings for paper maché coffee cups? (November 22)

Restoring gold trim, changing chrome to gold on motorcycle (November 19)

Silver Plating of Coin Rings (November 16)

50888-6i Damaged the finish on zinc table -- HELP! (November 16)

61354-1i Suitable finish for polished forged mild steel sculpture? (November 14)

Aluminum as 'art' painting surface open Q. (November 14)

Do It Yourself Nickel Plating (November 10)

Required Pretreatment before Nickel plating (November 9)

Need to make a silver ring look gold without using gold (November 9)

Making aluminum look like copper, gold, or brass open Q. (November 9)

Solving an electrolysis problem in home plumbing (November 9)

Old tin plated meat grinder is black (November 9)

61350-1i Colorful wall-hanging bowls with tie-dye foil look open Q. (November 8)

13393-1i Preparing sea shells for crafts or display open Q. (November 7)

How to remove lacquer from silver open Q. (November 7)

Why must Copper Bus Bar be Tin Plated? (November 3)

Zinc plating & chromating of Carburetors RFQ Winston GA (November 1)

Why can't I plate thick gold from a low gold content solution? (October 31) open Q.

15330-1i How can I make copper turn matte black? (October 31)

Copper sink turned black RFQ Underwood ND (October 31)

How to Remove Varnish from Brass (October 31)

Scratched and Dull Surface on Stainless Steel Refrigerator Door (October 31)

22177-9i Polishing Old Brass Fire Extinguishers (October 31)

Can't plate copper onto nickel (October 29) open Q.

22602-1i Black Anodized Aluminum Harley Parts Fading (October 29)

Protecting bare brass edge on chrome plated brass (October 29)

Outdoor wood furnaces : Stainless vs mild steel boilers (October 22)

Stumbled onto good metallizing method for electroforming (October 20) open Q.

Must I remove glued-on plastic from sill plates before anodizing? (October 18)

How to make wood finish wrinkle paint (October 15) open Q.

Cleaning the interior of an air compressor tank (October 12) open Q.

Replace zinc plating on motorcycle fasteners with nickel plating (October 12)

55866i Finish for a copper radiator/heatsink. Cleaning copper & solder (October 12) open Q.

Antiquing Paint / Faux Wood Finishes (October 5) open Q.

Can Cast Aluminum be Anodized? (October 5)

Need old, tubular chrome furniture steel wooled and chrome polished RFQ San Francisco CA (October 5)

Can citric acid clean a catalytic converter? open Q. (October 4)

Nickel plating before acid copper? (October 2)

Designing a plating setup to plate 2" diameter plastic coins (September 30) open Q.

Protective coating for brass elevator doors (September 30)

Anodizing titanium to blue color (September 30)

20193i Chroming carbon fiber/plastic (September 28) open Q.

Chromating carburetors/diecastings (September 21)

Painting cast iron fountains / restoring rusty fountains (September 20) open Q.

Anodizing of Aluminum Screws and Threads (September 19)

RIT dye for dyeing? (September 16) open Q.

33689-1i Rusted sheet metal HVAC ducting (September 15) open Q.

Painting copper gutters (September 15) open Q.

How to darken aluminum (September 14)

How to remove stove polish so wood stove can be painted? (September 14) open Q.

Electroforming a complex shape in thick copper (September 9)

Why Noxon Brass and Silver Polish Disappeared (September 8)

Copper remains on welding clamps despite muriatic acid bath (September 6) open Q.

1298-2i Nickel plating musical instrument valves (September 5) open Q.

How to strip Powder Coating from steel? (September 4)

Help, my yellow brass turned pink (September 3)

39638-1i Desperately Need Gillespie Antique Restorer (September 2)

61318-1i Looking to refinish my 1950s Chambers cooktop RFQ Louisville MS (September 1)

Strip newer paint on Geneva Metal Kitchen Cabinets to reveal original (August 31) open Q.

New silver plated euphonium changed color almost immediately open Q. (August 30)

Stainless steel flatware with mirror finish scratches too easily (August 30) open Q.

15303-3i Thai mid-century bronze flatware (August 26) open Q.

Home anodizing-Truths from the experts? (August 26) open Q.

Ruined my brass cabinet handles with vinegar (August 25) open Q.

Melting old gold to make new jewelry (August 25) open Q.

Paint not sticking to Ospho (August 23)

Dark brown or dark copper patina for Nickel/Iron weld (August 20) open Q.

11972-4i Recipe for red patina on brass & copper (August 15) open Q.

Determine & control copper concentration in acid copper plating (August 14) open Q.

Restoring the yellow dichromate finish on automobile carburetors (August 13)

Help with unwanted rainbow hues in clearcoat (August 12)

Fastener systems for aluminum pool cages (August 9) open Q.

Want to remove the paint from my new refrigerator (August 8) open Q.

Help with a knife blade turned black (August 8) open Q.

30442-4i How to paint this metal mailbox? (August 7) open Q.

61303i Protecting metal tools from corrosion (August 7)

Aluminum motorcycle polishing -- rims, wheels, swingarm, frame (July 29)

Need springs for Antique baby carriage (July 29)

Is 0.05µ gold plating "good quality"? open Q. (July 29)

Repair discolored copper awnings RFQ Chicago IL (July 27)

Restore gold plate/wash on sterling silver cup (July 26)

What to to paint burners on propane stove with? (July 26)

23897i How to identify if old lamp is brass, copper, bronze, or cast iron? (July 21) open Q.

Why black line on face from gold jewelry? (July 18) open Q.

61290i Require Iridescent Passivation Solution RFQ Perth Australia (July 18)

61288i Want "Battleworn Nickel" on AR-15 parts RFQ Hagerstown MD (July 13)

Bronze plating of a 1920's funeral fan RFQ Folsom CA (July 9)

Need shotgun barrel blued RFQ Wooster OH (July 9)

Restoring old copper washing basin (July 8) open Q.

Want silver plating instructions (July 7) open Q.

Q&As about Gold Plated Flatware (July 5) open Q.

61282i Seeking finishing suggestions on vintage receiver restoration (July 2) open Q.


Leaching Lead from Brass with MSA open Q. (November 24)

Replacing tin chloride with zinc chloride for spray chroming open Q. (November 23)

User re-engineer wants rust-free steel (November 9)

Plating a [Electrodeposition of a] Nickel-Chromium Alloy (November 4)

Titanium plating (Electrodeposition OF titanium) (October 31)

Was cyanide ever used in hard chrome plating? (September 22) open Q.

How to electrodeposit PbO2 (lead dioxide) (September 10)

61317-1i Anodized aluminum has microscopic black dots on its surface (August 30) open Q.

Manganese electroplating (Electrodeposition of Manganese) (August 14) open Q.

Plating onto Carbon Fiber: applications, methods, Q&As (July 30) open Q.

Producing hardened concrete nails (July 30) open Q.

Teflon coating of stainless steel (July 29)

History of iron electroplating (July 19)

When to replace magnesium electropolishing solution, or how to analyze? open Q. (July 7)


Why does sodium hydroxide heat up when mixed with water (October 28)

What part does voltage play in electroplating? (October 16)

Zinc Electroplating with vinegar and salt (October 15)

Sodium Hydroxide: How to make to 0.5 M strength (October 11)

What chemical heats up when mixed with water and is safe to drink? (July 30)

Building a really cheap electric arc furnace (July 12) open Q.


County trying to make me get gas insurance open Q. (December 1)

7137i Cleaning Dirilyte Gold-tone Flatware open Q. (November 29)

Need alternate to poly vinyl alcohol fiber for concrete open Q. (November 28)

29370i Identifying rings: Marking system for rings (November 12) open Q.

24359-31i Repair of barber chairs (October 13) open Q.

Cost and availability of iridium (October 21)

M&T Chemicals water tower Hanson Van-Winkle Munning (H-VW-M) memories & memorabilia (October 16)

12362i Coating tables and bar tops with thick clear pourable plastic (October 9) open Q.

Best pipe for natural gas lines: Copper vs. steel, plastic, CSST, etc. (October 5) open Q.

Strong welding fumes in bathroom (September 27) open Q.

Sedgwick Residential Elevators Parts and Maintenance RFQ Granite City Illinois (August 19)

Accidentally Swallowing Sodium Hypochlorite during root canal (July 30)

Hazmat transportation requirements & exclusions (July 21)

Drawn platinum wire as a hinge pin on bracelets & earrings (July 15) open Q.

32144i Markings indicating real gold on jewelry (July 12) open Q.

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