do-it your self bed liner

On one of my rucks, it came with the Rhino liner in the truck bed. It was ok for protecting against scratches/abrasions, but would still dent when putting heavy blocks, axles, etc in.

I found that the plastic liners protect better against dents in the sheet metal of the box, but they "creep" and rub on the paint underneath it which will eventually start to rust. I had a plastic liner put in over the Rhino liner so now it won't dent the bed when I throw heavy parts in it and the Rhino liner protects the paint from rubbing off past the primer. It seems reduntant, but I like it better with both.