I bought some turquoise filler from a woodworking catalog. You had to mix some hardener with it but I couldn't get the mix right and therefore it would not harden enough to turn. it kept coming out of the groove I had cut in the bowl. A friend of mine uses two part epoxy and adds wood dust or coloring to give it some character. Does anyone know of a supplier who sells epoxy in larger quanities than the two part tubes from 3M? Thanks Gary