So now you have to fess up. What is this colour matched urethane?Sure, give away my deepest darkest secrets. The rattle can back bumper was an experiment that actually worked. The factory paint started peeling off so I took the bumper off, stripped it, primed it and painted it with colour matched urethane. Then I wet sanded it with 2000 grit and finished with a coarse then fine polishing compound.