Someone put a couple of 1/4" scratches into my rear bumper. I tried Dr. Color Chip and the results are less than stellar. The local certified body shop quoted me $600 to remove the bumper, sand it down, and respray. I assume this means they will take it down to primer, respray and then reapply clear coat? A friend is telling me that aftermarket paint jobs like this are lower quality than factory jobs and the paint will peel. Any thoughts?