I was given a sample of a plastic material about 2 years ago at a show and have since lost it. It was about 1/2" thick and came in lots of colors with about a 1/16" outer layer that was one color, and the middle another color. The top layer can be machined off to reveal the inner core color. It is often used in creating playground equipment and exterior signage. Does anyone know what the name of the product is and has anyone ever used it? Suppliers?