aluminum

Looking to see how I can clean these. Or will I just need to get them redipped. Any help would be awesome.

Hey all, I did a quick search here on the forum and on Google. Didn't find much. Other than finding a donor car (not an option, forget it lol), anyone know the best place to find aluminum parts? I know as far as wheels, intake, heads, etc, I could buy from any auto shop or store. Im talking...