Oxalic acid removes rust stains, but not rust itself. I'm also curious how you would be planning on getting rid of the stuff after you're done doing it. Muriatic acid would burn the stuff off, but would probably harm the chrome. And any acid solution in a batch that big is gonna put off tons of harmful fumes that'll kill your respiratory tract. Hell, oxalic acid can destroy your kidneys if you don't play with it correctly. My suggestion would be to do some homework or just ride your bike. You sound like you're stepping into some territory that could **** you up or **** up the environment around you pretty easily.