I am in the middle of a resto project that will be lined on the floor and under the body and the frame. I used bondo brand sandable spray liner from checker a while back with good results. It lasted on my truck floor for years and hardly complained. It was thick though. I have thought about the duraliner in a bucket, but don't like how thin it goes on. I was wondering what people have used and how well it has held up. BTW my bed was line-x'd about 4 years ago and I have thrown EVERYTHING at it and it barely is scratched. Stained.... but not scratched.. I don't have that kind of money right now to do the frame and all the other stuff....