Kind of a weird question, but I know I saw this on one of the automotive-related TV shows recently. They are thin plastic sheets you can cut, mold, shape into anything you want, then once you have the correct shape, expose it to sunlight, and the plastic hardens permanently in that shape. I really need this for an interior project I'm doing. I could use fiberglass matting and resin, but that stuff is so messy, and it would take me a while to finish it if I did it that way. Anybody know what I'm talking about? I searched forever online but couldn't find squat...