I'm in the process of building a my dump truck. I bought a used dump body. The steel on it is in great shape. It has 3 foot wood sides, a metal bulk head, and a wood floor. my plan is to tear off all the wood, sides and floor. sandblast, prime and paint the frame. Then I'd like to put down 2 x 8 oak boards. Usually, they put down a sheet of metal on top. But, I got to thinkin, has anybody ever used the sheets of plastic on their dump beds? Or, I was thinking of just getting 2x6 plastic, and using that.. One factor of doing it this way though, is the cost. Any Input would be great.