Scholl Concepts Felt Pads can be used in combination with Scholl Concepts S0 Matting Compound for matting panels prior to painting. For large area applications, we recommend the use of S0 with the firm Felt Pads on a conventional dual action sander (3 to 5mm orbital stroke). For manual application, use S0 on the firm Felt Pad in combination with the iQ-Puck 2-in-1 hand polishing adapter. Felt pads are also suitable for glass and metal applications.