best thing to use on chrome is 0000 steel wool. It will remove rust, clean and polish at the same time and it won't scratch. Still not sure what kind of rim we are talking about here. If these are the little spokes, they are chrome. If its like a mag wheel, then its all aluminum.I have used aluminum foil wetted down with coca cola to remove rust spots from chrome. Never tried it on aluminum though. I wouldn't think it could hurt.