go to the haradware store, get some steel wool (I use the fine stuff), get some tin foil and go to town on the wheels. fists get off as much crap with the steel wool. then use the foil to rub away at the rim like you would with sand paper. The aluminum will stick to any pitted areas and give the whole thing an extra shine.. its cheap but its dirty, just make sure your wheels aren't too far gone.