What problems are you having? Peeling, cracking. Probably the finish needs to be stripped. Check for cracks and fillers. Some have been repaired with polyester or fiberglass type fillers. These will not adhere to the urethane. Any cracks or filled areas need to be welded in with urethane and sanded smooth. There are flexable fillers that will adhere to urethane if used properly with adhesion promoter. Once you have a good bumper get with your paint supplier and get a compatable primer with a flex agent. Be sure the color and clear coat if you use one have a flex in them. Be sure to use the flex agent in every coat you paint on this bumper or you will be right back where you started from in a short while.(posted 8007 days ago)Let me know if you have any questions.
Robert