I just picked up a set of 15 x 8.5 Weld draglights from a friend for $60. They were sitting outside for a couple of years and have stains that wont come out. I have tried everything from aluminum wheel cleaners to goof-off. The stains look sort of like dried up chocolate milk and dont appear to have any edges when you drag your fingernail accross them (I would think if the stains had "lips" that may indicate the plating was peeling off or something). I'm stumped and I cant find anyone who knows what to do. I am pretty sure that some sort of extreme polishing/buffing process is needed, but dont know where to start with alum wheels. These are you everyday Weld wheels with polished aluminum (the cleaners with the acid in them say not for use with polished alum) and the little round holes. Help me out, the sooner I get them ready the sooner I can launch at 6000 with the slicks im getting!