The painstaking de-molding process is “like an excavation,” Wolfe says. “I break off all of the big chunks of plaster, then wash the piece really thoroughly and pick all of the leftover bits of plaster out with dental tools, bamboo skewers, and tooth brushes.” Diamond tools are used to grind and polish inside and out, leaving the interior glassy and smooth, with a rougher, more matte finish outside.