A professional who tends battery of machines that tumble metal or plastic buttons in wire mesh barrels to remove mold flash (fins) or rough edges. Respnsibilities include:

• Loads barrel with buttons.
• Pours specified amounts of cleaning compound into barrel.
• Bolts on lid and starts machine to rotate barrel and tumble buttons for specified length of time.
• Shakes sifter to separate buttons from cleaning compound and shot (ball bearings).