The Ultimate Cheat Sheet on Best Car Scratch Buffer
http://brookskcmp279.tearosediner.net/what-the-best-best-car-scratch-buffed-out-pros-do-and-you-should-too
Do NOT use a wool bonnet on these covers, it's going to truly scratch the floor. A particular primer and an adhesive promoter should be sprayed on the bumper to insure the new paint will not peel and flake off.