The Bona Scrad System is an effective alternative to sanding screen that eliminates the potential problem of swirl marks. This unique abrasive system is a combination of the Bona Scrad Pad and Bona Scrad Wing and is ideally suited to intermediate sanding between coats of varnish. Combining the abrasive scrad pad with a conditioning pad allows wood fibres to be cut off and smooths out scratches throughout the sanding process.