The Nano Clay Sponge medium system works fast and achieves professional results with the new advanced rubber polymer technology. Replacing the use of the traditional clay bar it safely removes paint overspray, water spots, and other boned surface contaminants from the surface automotive paint, glass, moldings and plastic. Unlike clay bars the Nano Skin can be washed off by imply rinsing with water. The foam sponge pad really allows you to work efficiently with yourhand in removing contaminants and not cause swirls. Medium grade is for the heavily contaminated vehicle and Commercial trucks.