A professional who tends machine that sprays fiber can lids or paperboard box blanks with paraffin wax to make items moistureproof or airtight. Respnsibilities include:

• Fills machine reservoir with paraffin chunks and opens steam valve to heat and liquefy paraffin.
• Places items into machine that automatically sprays melted paraffin wax on inner surfaces as items pass under nozzle.
• Examines sprayed items to ensure uniformity of coating.
• Stacks finished items on trays or handcart for removal to storage area.
• May keep daily production records.