A professional who tends machines that clean or polish forming molds and components by any of following methods. Respnsibilities include:

• (1) Starts pumps on vapor-blast machine to circulate water and cleaning compound through hose.
• Places parts on table and pushes table into machine cabinet.
• Pushes control lever to start flow of compressed air through hose.
• Holds and turns parts while directing pressurized stream of water and cleaning compound onto parts to remove dirt, carbon, and scales.
• Dips parts in oil solution to prevent rusting.
• (2) Inserts and secures blank mold and plunger into chuck of open-end polishing jack or lathe.
• Holds emery cloth over rotating plunger or inserts rod, covered with emery cloth, into mold to clean and polish parts.
• (3) Holds and turns parts against rotating emery wheel.
• May soak parts in hot cleaning compound or scrape parts, using scraper to loosen or remove scales and carbon.
• May rub mold surface with oil or kerosene and abrasive stone or wire brush to remove scale, rust, scratches, and dirt.
• May apply cork or graphite paste coating to mold interiors to prevent adherence of glass to molds during forming operation.
• May store cleaned molds in storage bins.
• May transfer molds and mold parts from storage to production area, using handtruck.