These tack rags have the proper type and amount of resin to pick up dust without leaving contamination on the boat's surface. Other tack rags can leave a residue that causes fish eyes and craters. Tack rags are designed to remove light dust and dirt from the surface. Never use excessive pressure when tacking the surface. Let the resin and the weave of the tack rag do the work. Change tack rags frequently to ensure a clean job.