Two alternative products were selected from the previous trial based on effectiveness. Each product was diluted to 10% in 250 ml beakers using DI water and heated to 130 F on a hot plate.
Several silver, brass and copper parts were received coated with various buffing compounds. Six parts were cleaned in each solution for five minutes using minimal stir bar agitation. Parts were rinsed for 15 seconds in a tap water bath at 120 F and dried using a dry compressed air for 30 seconds. Once dry, a final observation was made to assess cleanliness.