Program a machine that applies acid to precision-etch metal and plastic.
Removes fiberglass boat decks and hulls from molds, using handtools: Pries edge of hull or deck from mold, using wooden tool, and taps mold, using mallet to loosen cast. Inserts airhose between mold and cast, or in hole in mold, and opens valve to blow cast loose. Grasps and works cast loose from mold. Places cast on dolly with help of other workers or clamps special lifting tool to tabs on hull and pushes hoist lever to fit loosened hull from mold. May assemble and temporarily join structural members, such as hull, deck, and headlines, using hoist, weights, and clamps. May grind edges of decks and hulls preparatory to removing from mold, using disk sander.