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I wouldn't use anything with acid including citrus (lemon) or oxalic acid (OA). I know oxalic acid isn't good for any non ferrous metal. I've damaged a variety of those metals in my OA tank.
Brass is an alloy of copper and zinc and you can eat the zinc right out of the copper and weaken it.
I have old Schwinn bikes I restore and I get rust off steel and chrome with OA but it will eat the cad plating right off the spokes if left too long.
OA can be bought as a powder at a home improvement store and dissolved in hot water. It's sold as wood and deck cleaner and it works great for that too.
Here's what it will do to rust if you ever have a need for that for gun parts. You need to degrease the part, but after that no scrubbing needed.
Brass is an alloy of copper and zinc and you can eat the zinc right out of the copper and weaken it.
I have old Schwinn bikes I restore and I get rust off steel and chrome with OA but it will eat the cad plating right off the spokes if left too long.
OA can be bought as a powder at a home improvement store and dissolved in hot water. It's sold as wood and deck cleaner and it works great for that too.
Here's what it will do to rust if you ever have a need for that for gun parts. You need to degrease the part, but after that no scrubbing needed.
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