The finishing.com Hotline Public Forum

• Acid resistant coating for aluminum (September 9) open Q.

• Powder Coating tiny blades for fishing lures open Q. (August 25)

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

• Need scratch resistant, conductive, black coating on copper strip (July 5) open Q.

• Inexpensive In-Process Rust Protection/Plating (June 17)

• 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)

• Need Matte Finish on Silver Bullion RFQ Detroit MI (May 14)

• 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 mirror finish on Socket & Philips screws (August 29) open Q.

• Polishing copper and brass (August 25) open Q.

• 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) open Q.

• 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.

• Black Oxide vs Phosphate (September 18)

• Powdered metal parts rusting after pickling process (September 16) open Q.

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

• How to make titanium-based surface activator for phosphating (September 14) open Q.

• Electroplating without acid pickling (September 14)

• Degreasing copper cylinders for chrome plating (August 21) open Q.

• Problems and solutions in zinc phosphating (June 16) open Q.

• Electrochemical etching of Fe Ni Cr AISI steels for "sandblasted" effect (June 14)

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

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

• Need masking help for anodizing (September 25)

• 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)

• Electrochemical Weld Cleaning on 316L Stainless Steel (September 24) open Q.

• Anodizing titanium with trisodium phosphate (TSP) (September 24) open Q.

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

• Problems electropolishing stainless castings (August 30)

• AMS2488 Type II on Titanium: maximum touch-up area? (August 29) open Q.

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

• 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) open Q.

• Stainless steel passivation color inconsistent (July 30)

• Oxalate Conversion Coating for Stainless Steel d

• 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.

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

• Alodine, Iridite, Chem-film not sticking / rubbing off (September 25)

• Dyed Anodizing Color Matching Q&A, Problems & Solutions (September 24)

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

• Cracking problem in anodizing (September 22) open Q.

• Nitric acid drag-in to dye/seal tank (September 20) open Q.

• Lines appear on aluminium profiles (September 19)

• 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)

• White powder on anodized finish (September 7)

• Chemical conversion coating on top of anodizing (September 6) open Q.

• Zincating on Aluminum: Problems with 6000 series (September 6) open Q.

• White corrosion spots/pits on chromated aluminum after 1-2 months (September 6)

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

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

• Hard Anodize Type 6061 Aluminum: stains (August 29)

• Film on anodized parts: is black dye tank contaminated? (August 25) open Q.

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

• Thermal conductivity of conversion coatings on aluminum (August 20)

• Anodizing is splotchy grey, not black (August 16)

• 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)

• 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 Inquirer 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)

• Chem-film colors: are gold and yellow the same? (June 28) open Q.

• Stains occur in anodizing only if bright dipped (June 26)

• Do pre-anodizing processes affect RoHS compliance? (June 25)

• Can Cast Aluminum be Anodized? (June 22) open Q.

• Current/Voltage for Aluminum Anodizing (June 19)

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

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

• 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.

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

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

• Acid Copper Plating Problems (September 25)

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

• Will rose gold gilding wear off to show yellow gold plating? (September 24) open Q.

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

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

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

• Need tin plating on 100 aluminum chain saw pistons RFQ WA Australia (September 21)

• Cyanide copper solutions temperature and anodes (September 19)

• Need Decorative Nickel Plating for Microphone Bodies RFQ Nashville TN (September 19)

• 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.

• Hexavalent chromate is okay, trivalent gets white rust and black spots in 96 hours (September 4) open Q.

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

• Zinc plating problem (August 29)

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

• Vermeil jewelry is tarnishing (August 12)

• Zn blue passivation turns yellowish (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)

• Problem of white spots after Zinc Plating (August 4)

• 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)

• Unplated area inside blind holes is rusting (July 19) open Q.

• 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.

• 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.

• Required thickness of tin plating for copper drinking water tank (June 30) open Q.

• Fingerprint stains & corrosion, on chromated zinc plated steel surfaces (June 28) open Q.

• Parts w/ yellow chromate losing color (June 28) open Q.

• Optimizing nickel sulfamate for high temperature electroforms (June 28) open Q.

• Soluble anodes for silver brush plating? (June 26) open Q.

• Zinc plating defects (Quality of metal finishing) (June 25) open Q.

• How to do anodes in acid tin plating (June 23) open Q.

• Zinc chloride keeps rising in zinc plating bath (June 17) open Q.

• Plating both outside AND inside of a tube (June 14)

• 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)

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

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

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

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

• 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.

• Seeking NADCAP AC7108 Consultant RFQ Paso Robles CA (April 27)

• 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)

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

• Ingredients for chrome (April 12)

• Hard chrome plating problem: dull gray plating (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.

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

• Screen printing onto Electroless nickel Plating (September 11) 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.

• Sandblast before Electroless Nickel plating (June 25) open Q.

• Plating of ABS Plastics; palladium and electroless nickel issues (June 14)

• 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.

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

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

• 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.

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

• White patches on new hot dip galvanized poles (September 23)

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

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

• Galvanizing kettle furnace and burner design (August 21)

• 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)

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

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

• Pimples on hot dip galvanizing (July 2)

• Prevention and removal of white rust on galvanizing (June 25) open Q.

• Does hot dip galvanizing weaken steel? (June 23)

• Rough & lumpy low quality galvanizing (June 23)

• Maintaining low contact resistance on zinc coated chassis (June 15)

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

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

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

• Testing the quality of blackening coating (July 16)

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

• Dacromet coating questions (July 23) open Q.

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

• Function of anode cell in CED (cathodic electrodeposition) coating? (September 6) 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.

• CED System Issues: Recovering paint, Ultrafiltration problems (June 18)

• CED Paint conductivity is dropping/rising (June 18)

• 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)

• Powder coating on zinc die-castings (August 16) 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.

• How to Powder Coat Plastics (Nylon, ABS, Polycarbonate, Composites) (June 18) open Q.

• Blast, prime, powder coat my aluminum railing RFQ Selbyville DE (May 9)

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

• Coatings for metal spectacle frames (August 30)

• Need Coater for Automotive Industry Die Cast Parts RFQ Belleville ON (May 21)

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

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

• Need PTFE (teflon) coating of thousand of pounds of wheelnuts RFQ China or Taiwan (June 25)

• Aluminium Bitumen Paint (June 17) open Q.

• Ceramic coating formulation (June 16) open Q.

• Sublimation Coating Introduction, FAQs and Q&A

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

• White colored spots on chromated zinc plating (July 23)

• Prepping gravure cylinders for storage (June 16) open Q.

• 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.

• Soldering Electroless Nickel plated components (June 11)

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

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

• Stripping the glass from a glass-to-metal seal (August 9) open Q.

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

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

• Stripping Nickel off Stainless Steel Substrates (June 25)

• Stripping Cadmium plating and choosing a method (June 18)

• 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.

• 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.

• Salt Spray Test -- ASTM B117 Operational Problems (August 25) open Q.

• 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.

• Scribe marks on galvanized samples (June 15)

• 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)

• 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.

• Wastewater treatment issues: Cyanide destruction questions (June 14) open Q.

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

• 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)

• How poisonous is Potassium gold cyanide? (September 4) open Q.

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

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

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

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

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

• 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)

• What kind of nuts & bolts to use when building a galvanizing plant (July 5) open Q.

• 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.

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

• Good Reference Books for Electroplating (September 21)

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

• Penetrant inspection per ASTM E-1417 (August 29) 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.

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

• Naming a Finish from its Looks (June 25) open Q.

• What is Chemical Brightening Process Standard (June 13) open Q.

• 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.

• 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.

• Hardening EN8 & EN9 parts (June 21) 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)

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

• Does this look like PGM content particularly Rhodium? (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.

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

• Chromating carburetors/diecastings (September 21)

• Scratched and Dull Surface on Stainless Steel Refrigerator Door (September 20) open Q.

• 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.

• 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.

• 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)

• Desperately Need Gillespie Antique Restorer (September 2)

• 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.

• 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.

• How to Remove Varnish from Brass (August 19) open Q.

• 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)

• Need to make a silver ring look gold without using gold (August 10) open Q.

• 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.

• How to paint this metal mailbox? (August 7) open Q.

• 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)

• Damaged the finish on copper table -- HELP! (July 26) open Q.

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

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

• Stumbled onto great metallizing method for electroplating/electroforming (July 24)

• 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.

• Require Iridescent Passivation Solution RFQ Perth Australia (July 18)

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

• Problems & solutions in copper electroforming (July 12)

• 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.

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

• Aluminum threads stuck, cold welded (June 27)

• How can I coat for sublimation printing on a low budget? (June 22) open Q.

• Galvanized stock tanks as swimming pools (June 22) open Q.

• Chrome plating of Ford F250 grill (June 21) open Q.

• Need door handles brushed-nickel plated RFQ Scottsdale AZ (June 15)

• Do It Yourself Nickel Plating (June 15)

• Neutralizer for acid copper plating? (June 4)

• Amperage requirements for plating (June 3)

• Wagner Ware (May 31) open Q.

• Need my stainless kitchen hood refinished RFQ Lavalette NJ (May 31)

• 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.

• Need kitchen table resurfaced RFQ Watford Hertfordshire (May 21)

• 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)

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

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

• 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)

• 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.

• 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.

• Repair of barber chairs (September 25) open Q.

• Identifying rings: Marking system for rings (September 22) open Q.

• Hanson Van-Winkle Munning (H-VW-M) memories & memorabilia (September 14)

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

• Cleaning Dirilyte Gold-tone Flatware (August 15)

• 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.

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

• How to Fix mercury damage to gold jewelry (June 21)

• Fiction stories involving plating (June 18)

• Hoyt Metal Ingot. What type of metal do I have? (June 16)

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

• Zinc oxide production by French process (June 6)

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

• 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.