The finishing.com Hotline Public Forum

• Does Plastlina/modeling clay accelerate corrosion of aluminum? (June 3) open Q.

• Microwave Oven Interior Reflective Materials (May 27) open Q.

• Inexpensive black electroplated finish? (May 18) open Q.

• Best solution to prevent tarnish on silver plated small accessories? (May 16)

• What are the finishes on this antique clock? (April 30)

• Choosing Stainless Steel vs. Galvanized vs. Zinc Plated Fasteners (April 28) open Q.

• Zinc-nickel Plating vs. Zinc Flake Dip-Spin Coating (April 21) open Q.

• Coating for low electrical resistance, but high corrosion resistance and wear resistance (April 11)

• Need conductive material that will bond to stainless steel (March 28)

• Plate warps and needs to be stronger and polished (March 23) open Q.

• How to finish wrought iron railings (March 19)

• Repairing titanium shafts by plating or hardcoating (March 8)

• Corrosion resistant coating for C45 Material (March 3)

• How to protect Beryllium Copper from corrosion by Ammonia (March 1) open Q.

• Does bronze corrode Cr-Mo-V steel? (February 17) open Q.

• Stainless Steel or Galvanized fasteners for Aluminum Siding (February 17) open Q.

• How to avoid rust (February 9)

• Which substitute for hard chromium plating? (February 2) open Q.

• PTFE thin film coating of 316L Stainless steel parts exposed to sulfuric acid (January 27) open Q.

• Alternatives to gold plating for Zari thread (January 24) open Q.

• Building a scintillator. How to get a bright/reflective surface? (January 13)

• How to polish aluminum steering wheels (June 4)

• Black colorant/dye for liquid buffing compound (May 21) open Q.

• What is difference between Ramax & Ra (May 3) open Q.

• How important is variable speed for a tumbler? (April 8)

• Formula for polishing and buffing compounds (March 16)

• How to Mirror Finish Alumina Ceramics (March 13)

• Need formula to make solid & liquid polishing compound for metal polishing (February 26) open Q.

• Looking for linear grinding/finishing tool practical for non-production use open Q. (January 16)

• Ra vs. Rz: Ra keeps growing, Rz stays the same? (January 2)

• Electrochemical etching of Fe Ni Cr AISI steels for "sandblasted" effect (June 8) open Q.

• Manganese phosphate: why does spec demand same source for blasting? (June 8)

• Zinc Phosphate coating problems (June 4)open Q.

• Cleaning copper discoloration from baking (March 30)

• Problems and solutions in zinc phosphating (March 25)

• How to etch silver without affecting aluminum? (March 5)

• Want good salt spray hours from phosphating without oil (March 1)

• Rack marks in zinc phosphating open Q. (February 4)

• Dip vs. Spray Phosphating (January 11)

• White lines along masked edges when selectively stripping zinc galvanized steel (March 8) open Q.

• Masking for Silver Plating Inside Hollow Aluminum Cylinders (January 24)

• Electropolishing of stainless steel problem: "frosting" (June 8) open Q.

• Coloring stainless steel (May 25) open Q.

• Coloring round type 304 stainless steel wire permanently (May 20)

• Electroless copper vs. Wood's Nickel strike for stainless steel (May 15) open Q.

• AMS 2700 Type II Passivation of Stainless Steel (May 14)

• Electropolishing of stainless steel -- Q&A, Problems & solutions (April 24)

• Hydrofluoric / Nitric acid etching/pickling of P.H. stainless steel (April 23)

• How to recognize passivation frosting? (April 8) open Q.

• Passivation leaves yellow or brown spots on 303 stainless (March 19)

• Oxalate Conversion Coating for Stainless Steel (March 15) open Q.

• Amps, Volts, Temp. & Time required for electropolishing? (March 12)

• Ferritic stainless steel surface finishing (February 24)

• Citric vs. Nitric Acid Passivation of Stainless Steel (February 11)

• Electropolish, Passivate, or Chemical Polish 4140 & 4340 Steel? (February 10)

• Rinsing after Stainless Steel Passivation (February 4)

• Acids for electropolishing stainless steel (February 3)

• Problems with passivation and salt spray testing of 15-5 PH stainless steel (February 1)

• Will grit size affect passivation of stainless steel? open Q. (January 29)

• Room Temperature Hardcoat Anodizing. Additives for Type 2-1/2 (June 9)

• Caustic Soda Etch Tank Suddenly Causing Intergranular Attack (June 8) open Q.

• De-smutting/De-Oxidizing of aluminum (June 6)

• White powder stains when electrocolouring anodized aluminum (June 6) open Q.

• Blisters when plating copper onto aluminum (June 6) open Q.

• Can sealant surfactants be removed? (June 6)

• How durable is the finish on sandblasted aluminum? (June 3) open Q.

• Dyed Anodizing Color Matching Q&A, Problems & Solutions (June 2) open Q.

• Anode to Cathode Ratio for Electrocoloring of Anodizing (May 30) open Q.

• Acid vs. Alkaline Etch before Anodizing or Chem-Filming Aluminum? Inquirer often helps others, so especially deserves our help (May 30) open Q.

• Sulfuric Anodized 2024 Al turning Pink open Q. (May 28)

• How to calculate anodizing time for different load sizes (March 24)

• Red Rust on Nickel Plating over Aluminum? (May 23)

• Black anodize fades in trichlorethylene vapor degreaser (May 23)

• Dip process for brightening aluminum cookware (May 20)

• Is touching up anodized with Alodine/Iridite/Chem-film/Chromate allowed? (May 18) open Q.

• Black spots in anodized aluminum profile (May 12) open Q.

• Aluminum cathodes for anodizing tanks (May 11)

• Hard Coat Anodize is Chipping and Flaking (May 10)

• Purple type 2 anodizing trouble (May 5)

• Sealing Aluminum to prevent oxidation? (May 5)

• Anodized aluminum galling situation (May 4) open Q.

• Corrosion? on anodized & gold dyed alloy 2024 parts (April 29)

• Cause of white spots on dyed 2024 aluminum (April 26) open Q.

• MIL-DTL-5541 Type I vs. Type II (TCP) issue (April 23)

• Sandblasting and Anodizing Leaves Bright Spot (April 20) open Q.

• Brown discoloration after clear anodizing (April 18) open Q.

• Pitting in Aluminum Threads after Alodine (April 16)

• Problem clear anodizing MIC-6 material (April 16)

• What is the Alcoa Alumilite 226 process and what shops offer it? (April 15) open Q.

• Electropolishing of aluminum: concentration and chemical make up (April 13)

• Electropolishing of Aluminum vs Bright-dip (April 13)

• Amps & volts jump around as chromic acid anodizing hits 40 volts (April 12)

• Severe erosion anodizing 7075 aluminum (April 4) open Q.

• Etching turned Aluminum Black (March 28)

• Okay to anodize small loads and largely empty racks? (March 27)

• Aluminum bright dip problems (March 19)

• Beadblasting aluminum plus brite dipping is causing pitting (March 15) open Q.

• Problems Black Anodizing 5052 Aluminum (March 15)

• Pulse anodizing rectifier settings? (March 14) open Q.

• Anodizing Racks: what material of construction? (March 9)

• Sudden drop in Alodine concentration (March 5)

• Can Cast Aluminum be Anodized? (March 4)

• Anodizing Coefficient of Friction? (March 2) open Q.

• Spotting on aluminum parts with chromate finish (March 1) open Q.

• White corrosion on anodized job after salt spray test (February 25)

• Numerous Type II Aluminum Anodizing Defects: White Spots, Missing Color, Ink Stains (February 24) open Q.

• Anodized Part Absorbs Grease into Oxide Layer Near Edges (February 23) open Q.

• Problems with Color of Hardcoat Anodize (February 23)

• How to etch and color anodized aluminum (February 18) open Q.

• How much air agitation for Hard Anodizing of Aluminum (February 17)

• Anodizing seal issue on bead blasted areas (February 17)

• Micropitting issue chromate conversion coating of Aluminum (February 15)

• How to eliminate anodizing appearance variations (February 9)

• Anodizing Color Fades in Autoclave (February 5)

• Water stain prevention for aluminum (February 5)

• Anodizing Appearance Problem on Silkscreened Panels open Q. (January 27)

• Aluminum piping underground. How to do corrosion protection? (January 11)

• Dissolved Aluminum in Anodizing bath -- How Much to Have, How to Analyze/Titrate, How to Correct/Adjust It (January 10)

• High Dielectric Anodizing of Aluminum (January 6)

• Galvanic potential of aluminum after conversion coating (January 4)

• Cadmium Cyanide Plating Bath Maintenance & Analysis (June 11)

• How to tack diamond to workpiece? (June 10) open Q.

• Black spots on parts after received by customer: fretting corrosion? (June 6) open Q.

• Problem in grinding Hard Chrome plating (June 5)

• Nickel plating / striking of stainless steel (June 3)

• Alkaline zinc plating problem: Black dots/spots that grow with time open Q. (June 3)

• Chrome Plating Problems on Gravure Printing Cylinders/Rolls (June 2)

• Pits, Stain marks on Nickel Plating (June 12)

• Hard chrome plating: Temperature (May 30) open Q.

• White patches in acid zinc plating (May 27)

• Bright vs. dull cadmium plating (May 26) open Q.

• Tin Plating Problem: doesn't take in random areas (May 15) open Q.

• Silver plating on aluminum blisters after baking (May 12) open Q.

• Silver plating on copper wire is not shiny and white (May 11)

• Can electricity "melt" part of the item being plated? (May 9)

• Converting rhodium dip plating solution for use in pen plating (May 6) open Q.

• Baking electrophoretic lacquer makes copper-nickel plating peel off aluminum (May 6)

• Very low tin plating thickness in an hour (May 2)

• Suitability of Electroless Nickel for very low service temperature? (April 29) open Q.

• Copper Pyrophosphate Delaminating from Strike (April 29)

• Hard Chrome plating -- pitting in horizontally plated shaft (April 27) open Q.

• Chrome Plating Steel in a Bath Normally Used for Plating Copper (April 22) open Q.

• White Patches in Trivalent Chrome Plating (April 22)

• Nickel plating white patches and dullness (April 21)

• Black spots in zinc plating (April 16)

• Current density required for chrome plating (April 16)

• Hard Chrome Fails Salt Spray Test if it's Ground (April 15) open Q.

• Substitute/Alternate/Replacement for Rhodium Plating (April 14) open Q.

• Ingredients for chrome (April 12)

• Hard chrome plating problem: dull gray plating (April 8)

• Zinc plating thickness for 500-hour salt spray? open Q. (April 8)

• Tin Plated Copper parts black smear/residue (April 8) open Q.

• Cadmium plating problem: pits, even on Hull Cell panels (April 7)

• Marks in tin plated copper bus bar (April 6) open Q.

• Zinc plating defects (Quality of metal finishing) (March 30)

• Converting zinc plating bath to zinc-nickel (March 29) open Q.

• Zinc-plating appearance problems (March 28) open Q.

• Cyanide bleedout in Silver Plating of Brass Castings (March 27) open Q.

• Zinc plating turns black in weld area (March 26)

• Problem holding Zinc concentration in alkaline Zinc plating bath (March 26)

• Acid zinc plating is dark grey and black (March 25)

• Electroplating with Brass (Electrodeposition of Brass) (March 24)

• Installing a black chrome plating plant (March 16) open Q.

• Plating chrome on a nickel substrate (March 12)

• Peel off problem from semi bright nickel (March 9)

• Help repairing chrome cylinder rods (March 8)

• White bronze plating problems (March 1) open Q.

• Acid Copper Plating Problems (March 1) open Q.

• Zn blue passivation turns yellowish (March 1) open Q.

• Marks and hazy spots after gold plating jewelry (February 26) open Q.

• Electroplating of iron onto bismuth shot (February 26) open Q.

• Tin plating anode problems (February 25)

• White patches in Chrome Plating (February 23) open Q.

• Purplish brown discoloration of gold plating (February 23) open Q.

• Restoring gold Iridite color to diecast parts (February 21) open Q.

• Haze on Ni-Cr plating surface (February 20)

• Economical iron electroplating; How to make up ferrous sulfate solution (February 19) open Q.

• Chrome plated hydraulic cylinder rods have pits (February 15)

• Nickel plating is coming out black (February 15)

• What makes up silver plating solution? open Q. (February 15)

• Plating of Rare-earth Neodymium Magnets (February 12)open Q. Inquirer often helps others, so especially deserves help

• Alkaline Zinc Nickel Plating of Hardened Steels open Q. (February 9)

• Q&A: Tin plated parts turn yellowish (February 4)

• What types of plating can be done in a barrel? open Q. (January 30)

• Zinc electroplating with yellow passivation is dull open Q. (January 30)

• My brass plating is nickel color instead of yellow open Q. (January 29)

• Zinc-Nickel Plating is 'silver' color in Black Passivation bath open Q. (January 29)

• Plating both outside AND inside of a tube open Q. (January 22)

• Tin-Silver Electroplating over Copper Pillar Bump open Q. (January 20)

• Manufacturing Process of Nickel Sulphate and Nickel Chloride (January 20)

• Black Nickel Bath Formula for Barrel Plating (January 18)

• Emissivity value for Cadmium plated steel and Zinc Plated Steel open Q. (January 16)

• Can lack of ZnCl2 additions cause chloride zinc roughness? open Q. (January 12)

• Hard Chrome Plating Additives? HEEF Advantages? MSA? (January 12)

• How thick is the chromate on zinc-nickel plating? open Q. (January 11)

• How to do brass plating on stainless steel (January 11)

• How much voltage and amperage for barrel acid zinc plating? open Q. (January 11)

• Need to touch up Cadmium plate (January 6)

• No adhesion of Electroless Gold onto Sulphamate Nickel Plating (June 4) open Q.

• Poor Adhesion of Electroless nickel on Sulfamate Nickel (May 15) open Q.

• Factors affecting Electroless Nickel deposit rate (May 9) open Q.

• How to determine plating defect vs. plastic substrate defect (April 24) open Q.

• Plating of ABS Plastics; palladium and electroless nickel issues (April 21) open Q.

• "Dot Skip" Problem in Plating of ABS Plastic (April 21)

• Decomposition/Plate-out of Electroless Nickel Plating Bath (April 5)

• What is the wetting agent for silvering of vinyl LP records? (March 30) open Q.

• Thermal cycle Test on ABS (March 15) open Q.

• Chrome plating peels off of electroless nickel (March 6)

• Plating Ultem 2300 and Composite Plastics (March 6) open Q.

• Palladium activation for EN Problems & Solutions (February 22) open Q.

• Problem doing EN on stainless with only non-magnetic plating (February 10)

• Silver plating with silver nitrate open Q. (February 9)

• Nickel Plating with Boron Nitride Particles (January 22)

• Black Stain in blind & threaded holes of electroless nickel plating (January 15)

• Mid Electroless nickel on Brass against an 6000 series Aluminium? open Q. (January 13)

• PVD Setup for Surgical/Medical Tools (May 16)

• Can my jewelry line be vacuum silver plated? (May 16)

• How to get Jet Black PVD finish (March 5)

• Welding of hot dip galvanised kettle (June 11) open Q.

• Increase existing GI coating without re-galvanizing (June 3) open Q.

• Black spot problem on hot dip galvanized mesh (May 20) open Q.

• How to reduce galvalume and galvanizing dross generation (May 14) open Q.

• Can Galvanized Steel Be Painted and with Reliably Good Adhesion? (May 11)

• Wiping system for continuous wire galvanizing? open Q. (December 19)

• Sulfuric Acid Solution Recovery Q&A (April 10) open Q.

• How Can I Reduce and Remove Zinc Dross (April 6) open Q.

• Need to build a Hot-Dip Galvanizing Kettle (April 2) open Q.

• Galvanising - Reduce & Recover Zinc Ash and Dross (March 18) open Q.

• Alternatives to hot dip galvanizing for a small shop (March 12)

• Titanium and Lead in hot dip galvanising (March 3) open Q.

• Rough & lumpy low quality galvanizing (February 22) open Q.

• How do we tolerance and gauge galvanized fasteners? open Q. (February 11)

• Is galvanized steel appropriate for water/glycol mix? open Q. (February 10)

• What degreasing & flux for HDG of lighting poles? (January 26)

• Black oxide solution with copper contamination (June 4) open Q.

• My caustic bluing solutions gets weak (March 10) 2nd Request open Q.

• How do you use wax coating at end of Black oxide process open Q. (February 8)

• How to make black golf putter heads? (January 30)

• Does black oxide add hardness? (January 11)

• Best Alternative to Black Oxide Finishing open Q. (January 5)

• Depletion Gilding, and Tarnish Prevention in low karat metals (May 24) open Q.

• Cost Estimating for S442 Zinc-rich Dip-spin Coatings (February 9)

• CED System Issues: Recovering paint, Ultrafiltration problems (June 10)

• CED Paint conductivity is dropping/rising (June 8) open Q.

• Electrocoating: Higher or Lower Solvent for Lower DFT? (May 31) open Q.

• Which pumps & membranes are best for CED bath? (April 13) open Q.

• Defects in CED Coating (April 12)

• How to Increase DFT Paint Thickness in Cathodic Electrodeposition (CED) system? open Q. (March 28)

• Sizing an e-coating rectifier (March 9) open Q.

• Book or notes for PT CED (February 2)

• High heat resistance powder coating (April 22) open Q.

• How to Powder Coat Plastics (Nylon, ABS, Polycarbonate, Composites) (April 15) open Q.

• The best pre-treatment process for Aluminum alloys to be Powder Coated (March 4) open Q.

• Aluminum pretreatment for powder coating (March 3) open Q.

• Brake caliper coating Q&A: Paint over anodizing & electrocoating? (February 21)

• Surface Treatments For Aluminum Concrete Forms (January 29)

• Powder coating reclaim -- does anybody take recycled waste powder? (January 15)

• Aqua Blasting before Powder Coating open Q. (January 8)

• Cathodic Electrophoretic Lacquer -- How to get matte black CED (May 21) open Q.

• Coatings for metal spectacle frames (March 16) open Q.

• Preserving bright copper using benzotriazole solution (March 14) open Q.

• Applying Colors to Nickel Plating (February 26) RFQ

• Clear coating for for exterior steel open Q. (January 22)

• Training on plastisol chemistry and application? open Q. (June 9)

• Sublimation Coating Introduction, FAQs and Q&A

• Do we need to clean paintlok ductwork before dryfall painting? (March 4) open Q.

• Paints for power transformers (February 19) open Q.

• Epoxy bleed-out problem on matrix leadframe open Q. (February 8)

• Poor adhesion of paint to aluminum open Q. (January 27)

• How to Passivate Copper (March 22) open Q.

• Clear and yellow trivalent chromates are fine but green gets white colored spots (March 11) open Q.

• Formula for Blue Chromate (Passivation) for Zinc Plating (March 4) open Q.

• Chromate conversion on cadmium not adhering (February 11)

• Soldering Electroless Nickel plated components (June 11)

• Why Pre-Bake before cadmium plating? (April 29) open Q.

• Should we be baking case hardened parts for Hydrogen Embrittlement? (March 24)

• Baked zinc plating vs. zinc without bake (February 12)

• Strip paint from aluminum without stripping chromate conversion coating (May 4) open Q.

• Hard chrome appears to be immersion depositing during operation (April 28) open Q.

• Stripping Cadmium plating and choosing a method (April 17)

• Restoring fire-blackened cast brass generator brush-holders (March 11) open Q.

• Scribe marks on galvanized samples (June 11)

• Gage R&R for an XRF plating thickness tester (June 10) open Q.

• Analysis of nitric-hydrofluoric aluminum etching mixture (May 12) open Q.

• Titrimetric procedure for trivalent and hexavalent chromate analysis (April 22)

• Salt spray / salt fog pH variation (May 12) open Q.

• Adhesion Tape Testing of Plating (May 2) open Q.

• Measure saccharin & butynediol concentration in Nickel sulfamate electroforming bath (April 23)

• Looking for a titration method for ferric chloride (April 22) open Q.

• Analysis of Rocheltex (cyanide copper) plating solutions (April 22)

• Wood's Nickel Strike Bath Analysis & Maintenance (April 19)

• Analysis of HNO3 & HF in titanium etch (April 18) open Q.

• Interpretation of EDX spectrum result (April 17) open Q.

• Adhesion test for chromate conversion on aluminium (April 10) open Q.

• Specific gravity of water plus acid mixture? (April 5)

• Thickness measurement of plating plus paint (March 9) open Q.

• How to Analyze Total Solids in Rinse Water? (March 7) open Q.

• Q&As on Operation of ASTM B117 Salt Fog Test Chambers: The Salt Spray Woes open Q. (February 11)

• Chrome plating thickness determination open Q. (February 9)

• Test for cadmium plating open Q. (January 30)

• Lab sink set-up? How to deal with titration waste? open Q. (January 26)

• Spot check for testing for Sn on Al substrate? (January 26)

• Measuring cadmium plating thickness magnetically open Q. (January 18)

• Copper vs. stainless "Stress Tabs" for Electroless Nickel open Q. (January 16)

• Salt Spray vs. Humidity Test for Passivated Stainless Steel? open Q. (January 16)

• How to calibrate a pH meter for 0.65 and 1.3 pH range (January 10)

• Recycling of sodium hydroxide from aluminum etching (May 5) open Q.

• Chromium in my Anodizing Waste? (April 19) open Q.

• Wastewater: big spike in Carbon Disulfide open Q. (February 15)

• Biological/Algae Growth in Tin Plating Rinse Tanks (February 11)

• Waste Water Treatment of Silica top coats (January 24)

• Wastewater treatment issue: Turbidity problems open Q. (January 19)

• Risks of chlorine in degreasing tanks in Pretreatment line in paint shop (June 3)

• Galvanized chicken wire in popcorn maker (April 17)

• Cyanide, its uses and its dangers (April 12)

• Safety of heating chrome to 400 °C (April 8)

• Will heated copper pipe emit cyanide gas or other toxins? (March 13)

• Is it safe to Parkerize cast iron cookware? (March 12)

• Toxic Lead and chrome in coffee makers and espresso machines? open Q. (February 20)

• Plating Tank Disposal -- What Are the Rules (February 18) open Q.

• Cadmium and chromate toxicity/safety from aircraft bolts open Q. (February 7)

• Rhodium allergy? open Q. (February 4)

• Cause of black mark on skin open Q. (January 21)

• Copper Bus Bar Sizing for DC low-voltage high-amperage (June 11) open Q.

• Selection of wire for wiring/racking parts (May 23) open Q.

• Rock hard scale problem in aluminum processing (May 20) open Q.

• Aluminum bright dip set-up requirements, material of construction (May 14) open Q.

• Does anodizing need explosion-proof electrics due to hydrogen evolution (May 5) open Q.

• What happens if Nitric & Sulphuric acids are mixed? (April 30) open Q.

• Choosing a plastic for nickel plating line installation (April 20)

• Problems in PVC & PVDF piping systems for sodium hypochlorite (bleach) (April 14) open Q.

• Hard anodizing chiller sizing (April 9)

• RO water causing rust in 316SS spray nozzles (March 25) open Q.

• Iridium Coated Titanium Anodes: Sources, Anticipated Life, Applications (February 25)

• Flow meters to be used in Tin Electroplating line (February 9)

• Looking to purchase a small zinc electroplating system (January 29)

• Cleaning/leaching a plating tank (January 19)

• Corroded Titanium Anode Baskets in Plating Tank (January 14)

• Meanings of plating spec abbreviations: MFZn-Ni, MFZn1c, MFZn2-C, MFZn-1S-2, MFZn8-S, etc. (June 11)

• ASTM B-449 and other specs for Chromating Aluminum Q&A's (March 27) open Q.

• Testing adhesion of electroless nickel plating (March 27) open Q.

• Black oxide over cad plated NAS6604 fasteners? (March 12) open Q.

• Overview table of plating and its properties (February 21) open Q.

• Looking for a breakdown of spec.: STD3947, Fe/Zn-Fe8c4 open Q. (February 4)

• Is Nickel Strike allowed before Cadmium plating heat treated bearing steel? (January 14)

• Where to find Dr. Alec Watson's paper on Nickel Sulphamate plating (January 12)

• Anodized Aluminum Coating Weight Testing ASTM B137 open Q. (January 8)

• Zintec vs. zinc electroplated CRCA steel (June 11)

• Finishing Related Basic English Terminology (May 15)

• KTL shielding spot technical term (May 12) open Q.

• What do "gZn" and "tZn" mean? (April 8) open Q.

• Powdered metals (Copper) in Los Angeles, CA (March 15) RFQ

• Electroformed Nickel Bellows Annealing Process (February 23) open Q.

• Hardening EN8 & EN9 parts (February 18) open Q.

• Can Powder Coating Affect Heat Treatment or Weaken Aluminum? open Q. (January 12)

• Problems in recovering gold from soil (June 6) open Q.

• Purifying 'smelted computer parts' by re-smelting (June 4) open Q.

• Cleaning gold that has been burned 2nd Requestopen Q. (April 24)

• Refining of Palladium and making its salt (February 19) open Q.

• Melt old gold to make new jewelry open Q. (January 22)

• Problems and solutions for copper electroforming (June 9)

• Antique baby carriage restorations (June 9) RFQ

• Seeking Iridescent Paint or Powder Coating (June 6) open Q.

• Neutralizer for acid copper plating? (June 4)

• Amperage requirements for plating (June 3)

• Wagner Ware (May 31) open Q.

• Nickel Plating Brighteners: Everything to Know open Q. (May 29)

• Should I cold-galvanize, powder coat, or do both on an anchor mount (May 23) open Q.

• Cast Iron Cook Stoves: Where to find parts and how to restore (May 23) open Q.

• Chrome plated 1950s dinette tables and chairs -- restoring & protecting (May 14)

• Blue/green/verdigris patinas for zinc Q&A (May 6)

• Base for bathroom faucets is corroded and needs painting (April 30) open Q.

• Change my white gold ring to yellow gold (April 26)

• How to tell hard anodizing from regular? (April 26) open Q.

• Plating the inside of a gas tank (April 25) open Q.

• Acrylic Tub Damaged by Drain Cleaner (April 22)

• Gold Plating of Fancy Bathroom Fixtures (April 22) open Q.

• Making a dark black watch dial (April 20) open Q.

• Home nickel plating with vinegar and salt (April 17)

• Can nickel plating fill pit and scratches (April 14)

• Design Project: Recycling Copper through Electroforming/Plating (April 10) open Q.

• Remove copper-nickel cladding from copper core coins? (April 9)

• F.B. Rogers Item -- What Is It? (April 8)

• How to turn copper aesthetically green (April 7)

• Tea Service: Sterling or Silverplate? (April 1)

• Help, my yellow brass turned pink (March 26)

• Do It Yourself Nickel Plating onto Steel (March 26)

• Clear coating of Silver for Anti-tarnish (March 25) open Q.

• Steel vs. aluminum patio furniture: corrosion resistance? (March 24) open Q.

• Artistic painting with anodizing (March 18) open Q.

• Gluing to Polypropylene? (March 10) open Q.

• Galvanic Reaction between stainless sink and zinc washers (March 8)

• Green fingers from gold rings (March 7)

• Iron Plating (Electrodeposition of Iron onto other materials) (March 6)

• Need relining/re-tinning of copper pots & pans -- or tell me how to (March 5)

• Remove rust with muriatic acid (HCl / hydrochloric acid) (March 5)

• Mystery patina on copper electroforms (March 5)

• Zinc electroplating for hobbyists and school projects open Q. (March 4)

• How to tint headlight metalizing? (March 3) open Q.

• How to make Pewter Shiny? (February 26)

• Need Dupont Lucite Acrylic Lacquer paint (February 25)

• Replating of barber chairs (February 23)

• Silver Plating turning pink (February 23) open Q.

• What chemical will heat water to melt ice? (February 22) open Q.

• How to Fix mercury damage to gold jewelry (February 20)

• Removal of clearcoat on copper (February 15)

• Trying to make Nickel Acetate D-I-Y (February 14)

• Restore/repair black porcelain sink finish (February 8)

• Paint removal in corners of wood door (February 1)

• Copper Plating from an Ammonia Solution (January 31)

• Preparing acid copper brightener (January 30)

• Zincate formulas for plating on aluminum open Q. (January 30)

• Can I do 'rusting process' on nickel plated items? open Q. (January 27)

• Removing tarnish on brass & copper open Q. (January 27)`

• Restoring rusty cast iron wood stove, painting or polishing it (January 23)

• How to fix pewter that turned gold color open Q. (January 20)

• Can I rubber line a bottle cooler? (January 20)

• Lacquering / clear coating a Brass Bed (January 18)

• Home Anodizing (January 18)

• Boiling water seal for home anodizing? open Q. (January 18)

• High strength fastener Q&A's, Issues & Answers open Q. (January 16)

• Paint/powder coat Aluminum Wheelchair Q&A's (January 14)

• Stripping a faucet down to raw brass open Q. (January 13)

• How to clean Birds in Flight metal sculpture open Q. (January 13)

• Pre-coating for sublimation transfers onto ceramic (January 11)

• How to electroplate Aluminum onto Aluminum (January 10)

• Yellow Chromate Adhesion Problem (January 6)

• Rash from Ring? Fixed by Boiling in Vinegar & Peroxide! (January 5)

• Demi-fine gold plating of jewelry open Q. (January 5)

• Restoring the dark brown finish to copper sinks (January 4)

• How to Blue / Blacken Brass open Q. (January 3)

• How can electroplating cathode current have efficiency less than or more than 100%? (May 21)

• Can't understand difference between hard chrome and decorative (April 21)

• High strength bolt testing (April 20) open Q.

• How to make Zinc Chloride (February 21) open Q.

• Electroforming of Copper Foil open Q. (January 10)

• Teflon coating of stainless steel open Q. (January 2)

• Science Project: White Precipitate in Copper Plating? (February 22) open Q.

• Science project on the effect of SALT & WATER on steel wool (February 4)

• Taking antique brass bed apart (June 11) open Q.

• Accidentally Swallowing Sodium Hypochlorite during root canal (June 7)

• Zinc oxide production by French process (June 6)

• How to do bottle cap tables and bartops with pourable epoxy (May 21) open Q.

• Identifying rings: Marking system for rings (May 20) open Q.

• Corrosion/calcification of ladders, boilers, and brains (May 18) open Q. Inquirer often helps others, so especially deserves our help

• FB Rogers trademarks/insignia on Vases, Crumb Catchers, etc. (May 18)

• Stiffel lamps: How to repair Q&A's (May 11) open Q.

• Need sweet spirits of nitre (May 6)

• Hydrolysis and HHO hydrogen energy for cars (April 16)

• Cleaning Dirilyte Gold-tone Flatware (April 16)

• Silver extraction from waste hypo/fixer solution (April 16) open Q.

• Ceramic Tile Cleaning with muriatic acid (April 12)

• Freezer section of my fridge oozes orange goo (April 12)

• Why is Panchlok statue made of 51 grams of each metal? (April 4) open Q.

• Hanson Van-Winkle Munning (H-VW-M) memories & memorabilia (April 4)

• Antique icebox Q&A's, Problems & Solutions (March 30)

• What is 'Kelite'? The Kelite Bldg. in Los Angeles (March 27) open Q.

• Maple Syrup Boiling / Evaporator Pans (February 25) open Q.

• Fix frozen zipper stuck from salt spray or corrosion (January 12)

• Mill Scale Uses and Applications open Q. (January 5)