For this guide, we’ll be spraying primer, paint, and clear coat and it will all be done by rattle cans. The 1K primer and color-matched paint are purchased from Paint Scratch, and the 2K clear coat can be found online. Even using rattle cans to spray paint your bumper, you can get amazing results especially if you have a good color match and use a 2K clear coat, which hardens up to a professional level finish.