Swish the brass parts in a hot citric acid solution for 2 - 5 minutes. I flat teaspoon in a liter. Rinse well and allow to dry. They will not tarnish again during your lifetime unless reworked. Works like magic, keeps my brass nice and shinny.
Google.... sorry, I couldn't resist.
Give it a try on copper, it may work depending on alloy. Pontiac428 said it reacts with the copper, it's been a long while since I did the research and experimentation on this process, but I use it a lot.
Lemon juice (citric acid) is a traditional cleaner for copper bottom cookware, etc. And though cooking is much rougher on the copper than just handling would be, the copper does tarnish again. So I wouldn't count on citric acid for long term protection.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.