How It's Made Season 22 Episode 7 Sanders, Solid Terrain Models, Stucco, High-Speed Roll-Up Doors ( Air Date 2013-11-28 ) Genre Documentary category. Overview "Motors, abrasive pads and dust-control components are assembled into powered sanders. Digital geographical data guides the production of detailed solid terrain models; mineral ingredients are blended into stucco for coating buildings; and flexible door panels, tracks, sensors and high-speed motors are combined into rapidly opening industrial doors.".