The non-woven cleaning material is glued to a fiberglass backer. This makes POLICLEAN® PLUS discs ideal for face-down grinding. For coarse cleaning work such as removing paint, scale, heat discoloration, rust and adhesive residues. POLICLEAN® is a coarsely structured, abrasive, non-woven cleaning fabric that was developed from a special combination of synthetic fibers and abrasive grain.