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Ted Mooney, P.E. RET
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for Metal Finishing 1989-2025
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Cleaning and preparing aluminum and Copper alloys for oxidizing and clearcoating
I am trying to prepare brass and bronze pieces for oxidization and clearcoat, and aluminum for clearcoat only. I have seen metal etch solutions in hardware stores but they seem to be only for steel and aluminum.
What is a good solution to prep brass/bronze for a darkening and then its clearcoat?
hobbyist - Vallejo, California
2005
For copper and brass You can use 10% sulfuric acid, on aluminum You can use very short dipping in 10 % sodium hydroxide solution.Other solutions are more complicated.
Before colouring, you must degrease Your objects -- acetone
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or alcohol are both usable (both very combustible).Good luck!
- Cerovski vrh Croatia
2005
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