Some time ago, a friend of mine gave me the 14" wheel covers from his early 90's Dodge Spirit/Plymouth Acclaim and they were coated with brake dust. As I remember, Simple Green or even Purple Power didn't work. I soaked them in the laundry tub. On the laundry shelves above my head(where my wife keeps all laundry/bathroom products) was a can of Lisol Bathroom Tub and Tile cleaner. You wouldn't beleive the results. When I was done cleaning the silver wheel covers, they looked brand new, with the exception of a few scratches. I dabbed the scratches with some silver touch up paint and slapped the covers on my daughters old Honda Accord. I also went to the Dollar Store and bought 4 little round side mirrors(the ones that you stick on your outside sideview mirrors) and put one on each of the centers of the wheel covers and they looked great! On the center of these particular wheel covers there was a round indentation where an emblem might go. This is where I stuck on the little round mirrors. It was a perfect fit.