I rattle-canned mine with bed liner, also. I did it 4 years ago, and it still looks fine. If I were to do it again, I think I would use a lighter color. I used black and it makes it very dark inside. I agree that the spray was kind of a hassle. Roll on would probably be easier, or maybe even Krylon for plastic. It wouldn't be as strong as bedliner, but it would be easy to touch up.