Apr 17, 2010 A sanding sponge can scrub corners, dirty edges, drywall, and other areas. It is highly flexible and can be used on flat and contoured surfaces. A sanding sponge can be used for multiple cleaning purposes and needs to be cleaned from time to time as the dust can attach to the sponge and make it less effective. The biggest advantage of using a sanding sponge is that it can be washed to