Superior Pads and Abrasives PCW06 A dense, firm sponge for applying and polishing your paint system, excellent results with all leading makes of compounds and polishes. Ideal for polishing automotive paintwork, acrylic, marine and aerospace finishes. All pads are 6" diameter x 2" Thick. Generally on any paint when aggressive buffing is not required. On fresh or cured paint when finishing a job or doing a one step process on good clear coat. Foam can be used on fiberglass but it is not as aggressive as wood and will not leave swirl marks if done improperly. Slower rpm is required when finishing with foam - between 1200-2000 RPM.