Part 4/9:
He shares that the setup involved aluminum, copper plates, and a carefully prepared wax disc. The wax used was Carnauba, a hard wax prized for its polishing qualities, and the construction required meticulous care. For instance, the wax disc was about 8 inches in diameter and roughly 0.625 inches thick, with copper plates approximately 0.032 inches thick. Achieving a uniform, crack-free wax layer was a significant challenge; early attempts resulted in cracking due to uneven cooling.