GP90001 Cerium Oxide Fine Grade, Glass Polishing Solution, Glass Polishing Powder / TREO 95% / 2.5 microns / 1.75oz 1.75oz (50g) Cerium Oxide Fine Micron Grade Optical Glass Polishing Powder Used for the final polishing blemishes, scuffs, light scratches, lime scale and adhesive residue. Average Particle Size 2.5 micron. Is high grade refined and perfect any type of glass High suspension in water and quick polishing when used with any felt polishing product, No sharp edges, fast acting scratch removal. An abrasive for the polishing of flat glass.