Original poster: "Robert Hanford" <pomnept-at-comcast-dot-net> Hi Stephen, I used a product called Envirotek Lite , which I ordered from Dick Blick art materials. I've only run this coil twice, but the secondary works and looks great. I used two coats . It hardens quickly. By the way, I am sure there is info about this in the archives. Good luck and keep us posted! Robert Hanford