You could just use 1 part vinager(sp?) and one part water.. mix it in a bowl and put a paper towel in there and rub your rims.. you dont want to use all that crazy stuf.. i've heard of simple green getting into the rim and caroding it and I dont think that would be a pleasent experience. So stay away from the harsh cleaners.. you dont need to strip the finish off them, just get the dust and gook and what-not off them..