I did some extensive research trying to find out what process the factory used for the original satin finish, and came up empty. It appears that it was some kind of etching process, not paint or a coating. If you look at a set of originals, there is no distinct line like you get with the painted on moldings. I replaced the ones on my 67 with aftermarket chromed ones, and they do not fit nearly as well as the originals. On my 69 I just sanded and wire wheeled the corroded areas on the originals, filled the pits with epoxy filler, primed and painted with argent silver, and they look pretty good and have held up well. I figure they look and hold up as well as the aftermarket ones, and I didn't have to go through the headache of prying them off. Plus, they fit better!