Filon skin?

Teardrop Trailer - How I Built Our Teardrop Trailer...looks like Bruce Osborn used Filon to skin it.
Filon is made by Kemlite Corporation, which is the largest frp manufacturer in the world and are located in Illinois. Filon is a durable semi-rigid gel coated exterior FRP [Fiberglass Reinforced Polyester] resin material. It comes in 3 shades of white and 1 shade of gray which the color is all through the product. Our color is the most popular color used in the RV industry, Polar White. The most common grades come in .040 and .060 thickness and in 8' wide rolls up to 500' long. The Filoplate gel coated surface is highly scratch, abrasion and dent resistant with excellent weathering characteristics. The maximum allowable bend radius is 7" or greater. Maintenance requires washing with liquid detergents and if you wish to wax, you can use automotive or marine waxes or use cleaners developed for use on fiberglass boats, showers and tubs.