This ZPM started with a styrene and wood base. After several smoothing sessions I sculpted the fine points with Apoxie Sculpt. The lines are made with apoxie sculpt. I molded the master with Smooth-on products the new "Rebound 40". I then added the 1/4 inch clay lining for uniform thickness. After that I molded the other side (so I could make hollow cast) The resin was also from Smooth-on resin with so-strong tint. Both molds are designed to fit in my smooth-on pressure casting pot. This allows me to make bubble free castings. Thats important because of the lights. If I didn't pressurize them wow it would look horrible.
But here you go. I will be posting more detailed in depth instructables. In the mean time look for us on facebook and twitter!