Remove rust, oxidation, and coatings from a variety of metals with the Bear-Tex High Strength A/O Medium Grit TR (Type III) Polishing Disc, which is non-woven and quick-change. Exceptionally durable, this disc conforms perfectly to the shape of the object. The aluminum oxide grit ensures a consistent cut and even surface finish. This medium grit disc is suitable for a wide range of surfaces, including fiberglass/composite, titanium, brass, cast iron, and copper, for great versatility.