To refinish a bumper so that it looks new again, you’ll first need to repair the major damage so that it is structurally sound. And then prior to spraying primer, paint, and clear coat so that it looks pristine again, you will have to prep the bumper by filling in the damaged parts of the bumper with body filler, and sanding it smooth.
If you have a cracked bumper and depending on how severe the damage is, you may be able to repair it yourself with a variety of tools and materials. On this tutorial, I’ll be repairing a cracked bumper using fiberglass resin, bumper repair epoxy, and flexible glazing putty. Using each of these various items serves a specific and important purpose.