[Williamleo]

Bdyman is right. On my Alero, I had a big piece of paint come off from the lower part of my left front fender, from rust. So I went and bought the right color paint and rust inhibitor primer. I sanded it down so no rust was showing at all, primered, sanded, primered and sanded with very fine grit paper. I sprayed the color, fine sanded, sprayed again, let dry and clearcoated it. It came out perfect! Everyone said wow! Can't tell at all. That was in September. Even though my car is always spotless, here it is the middle of December, rust is coming through again and looks worse than before.
So bottomline? Wasn't worth it really. It's going in the shop beginning of April to be fixed right.