This is a 2" thick slab of cedar that has been reverse routed so the letters are raised above the base. The sign was then epoxied with CPES (good stuff). The raised letters were painted a base of black then a coat of prismatic pearl applied over the top. The color shifts as you move around the sign. Then the whole thing was clear coated with Awlgrip urethane. It had to stand the rigors of Austin sunlight.