I have really good luck with the rustoleum truck bed liner. That's what is on my roof rack too. Skip the "pro" version, strangely, it's not as good for our purposes. The standard works great.I'm going to try this Rustoleum Spray truck bedliner. It doesnt build real thick like Line-x but it should be fine for what I'm doing.
). "T'aint Nothin'!"