Tiny Trailer Build Ep 4 Water Proofing the Trailer with PMF 

In this episode I waterproof the camper with what is called Poor Man's Fiberglass or PMF. This completely seals the wood using canvas, glue and paint. It provides a better weather barrier then aluminum skin but is more forgiving then fiberglass. Although the finish is not as flawlessly smooth as aluminum I really like the rustic textured finish that the process produces.