I use my truck quite frequently but my bed has a plastic liner that I don’t want to get rid of due to the price of a new one. I want to coat the one I have with something, i’m just not sure what would work best on plastic. I was thinking just regular spray in bed liner, or maybe undercoat. Not sure if anyone has any advice. Thanks, (I included a pic of my truck, an ‘89 F-150 that I daily drive.)