Program a machine that applies acid to precision-etch metal and plastic.
Tends machines that recap and retread tires for reuse: Inspects tire to determine whether it is suitable for recapping and rejects tire if damaged beyond repair. Pushes tire against power buffing wheels, using tire holder, to prepare tire for recapping or retreading. Builds new tread onto buffed casing, using brush or spray gun to apply rubber cement, and hand roller to cause tread to adhere to casing. Tends mold that vulcanizes tread onto tire and molds tread design, and adjusts controls to inflate air bag within tire to specified pressure and heat mold to required temperature. May tend machine that automatically ingests, extrudes, and applies rubber to buffed tire.