I restored the wheel covers on our 1969 Cadillac and this is what I did. Lucky to have covers to start with that had no dents. First, removed the crest from the center of the wheel cover and threw them away. I then degreased both sides and scrubed the backs with CLR (calcium, Lime, and Rust remover). Next took mineral spirits and cleaned all the tar off of them in a circular motion, and wiped out the best I could, the silhoette of the old crests. The repairs that I did do, were to bend back into the correct position every tang/finger on the back of the wheel covers with a linemans plier's being careful not to snap them off while bending them. The biggest Job, polishing. I wrapped a clean towel around a new sponge with a slice of box board on each side of the sponge (cereal box. etc.) to keep a flat surface, this way I would be less likely to polish lower than the high points of the wheel cover. Then, found the best jewelers polish I could get that had some grit to it and applied a line across the towel and polished each cover in a circular motion to retain the circular pattern on the stainless steel covers, from the factory, you can see in the hubcap. Then repurchased the crests from a vendor and replaced with push nuts from the hardware store. I left the black alone to retain an appearance similar to the wear the rest of the coach has. I did however talk to a pinstriper that could repaint them by hand for $75.00 per hour if I would like. Start to finish I have 7 hours into each wheel cover. I have had comments on the wheel covers specifically asking where had I found such nice wheel covers.