The 3M 07445 pad has fine mineral for very light cleaning. Use with liquid detergents for wax mold deflashing, highlighting and top coat rubbing of wood, cleaning of porcelain, stainless steel, chrome, painted surfaces and glass. The 3M 07447 pad is for scuffing before applying paint and primer-surfacer. Also used for used car reconditioning. cleaning upholstery, headlines and door pads, chrome and white wall tires. The 3M 07448 is an ultra fine hand pad for light cleaning, finishing of metal, plastic, composite and wood surfaces. For final sanding of primer-surfacer.