A variety of automotive bumpers today are made out of plastic rather than steel. Just like metal bumpers, plastic bumpers can lose their sheen. They can fade or peel because of sun, rain or other environmental circumstances they're exposed to every day. Fortunately, you can refinish your plastic bumpers and give them new life without having to even remove the bumpers to do it.
Clean off the plastic bumper so there's no dirt or other contaminants on it. If there's paint on the bumper you should sand it off, particularly if the paint is already peeling off.
Place cardboard beneath the bumper and between the bumper and the rest of the car. If you need to, use blue painter's tape to tape off other parts of the car so you don't get any of your spray material on them.
Spray the bumper with your bumper finishing product. Spray an even coat that doesn't drip, and make sure you have the same amount of spray on all parts. Let the spray dry. If you need to, you can spray on a second coat for added protection.
