A professional who tends sanding-and-buffing machine that smooths and polishes surface of plastic sheets to specified finish. Responsibilities include:

• Installs sandpaper belt in machine and sets tension of buffer springs to regulate pressure of buffers on sheets, using wrench.
• Starts machine and feeds sheets into machine.
• Observes ammeter to verify machine load specified for sanding.
• Verifies thickness of finished sheets, using dial indicator micrometer.
• Examines surface of sheets for defects, such as scratches, dull spots, and cracks.