I have a painted rear bumper that is getting pretty abused by old dog hopping most of the way in to the hatch. Lifting old Merlin results in a humiliating look from him and rude noises and groans emanating from both dog and myself . Ramps are out as I need all the space I can get with the two of them. I'm considering using a black sprayed on polyurethane on just the top surface to hide claw marks and to add a bit of traction. You know, like the spray on bedliners for trucks. I know it isn't going to be a winner in any consmetic contest but having shiny paint on the top seems like a poor idea to begin with. Crazy idea? I wonder if it can later be stripped and repainted.