I have a number of chips and the tip of my front bumper needs some light bondo and a spray over. I ordered my GM paint color from Paintscratch.com. It comes with a 2oz bottle of paint, 2oz bottle of clear coat. Also spray cans of paint and clear coat. Rubbing compound and adhesion promoter What do I need to know and think about as I start this project? Color matching/blending? I would like to sand some of the chips a bit to make them smoother before putting the paint on. Thoughts? Thanks!