use an all purpouse cleaner first, then a wax,grease,adhesive remover with a stiff brush... and they are white... works every time...Biscuit said:Coil cleaner works very well too. If you work in the refrideration business, you know what im talking about. It will take off all the dirt and shit from your tires and rims. Not much elbow grease needed. You can get this stuff at a refrideration parts store. But beware...it can take off that nice paint job too...only use it on tires. I garauntee ALL the dirt will come off.