A compound + polish in one product, No. 631 cuts quickly to eliminate moderate to heavy defects; oxidation, minor scratches, swirls, stains, and compound haze from fiberglass and gel coat. Fleetcut’s engineered nano abrasives and nourishing oils leave behind a mirror finish while facilitating the easy application of Collinite’s protective wax coatings; improving wax bond, spread and durability. Exclusively for marine detailing. Not designed for use on anodized aluminum, clear coat paint, plastic, or glass.