A professional who tends oxidizing tank that produces dark, lusterless, decorative finish on surface of metal articles, such as door lock parts, buttons, buckles, and small-arm parts. Respnsibilities include:

• Places containers of workpieces in tank of oxidizing solution for specified time.
• Dips articles in successive baths to neutralize oxidation.
• May start tumbling barrel to dry oxidized pieces in sawdust.
• May mix chemical solutions according to formula.
• May tend degreasing tank to clean workpieces before oxidizing.