I have a white 2006 Silverado and the paint is peeling in a few spots. The two worst spots are on the tailgate and on the roof. Each spot is about 8"x8" or so. It is down to the grey primer, and is flaking around the edges. I would like to touch it up, and make it look half-assed decent and stop the peeling until I can repaint. Any tips, or advice? Thanks in advance.