Abstract: Polishing compositions and methods are described for removing scratches and other imperfections from a variety of plastic surfaces in order to improve the clarity and optical quality. Such polishing compositions include a blend of suspension agents, at least one suspension agent having thixotropic qualities and at least one suspension agent having constant viscosity; solid abrasive material; water; and a lubricant. The compositions also preferably include a surfactant. The polishing compositions are applied by means of pads made from a variety of materials, including open-cell polyurethane or polyester, fleece wool, cotton, or other synthetic materials. The compositions are applied by hand or by means of a hand-held rotary, orbital, or oscillating machines, with fixed or variable speeds, and are also compatible with existing scratch removal machines, such as robotic machines.

Abstract: An applicator pad for use with a polishing composition for removing scratches or other imperfections from plastic surfaces is disclosed which is generally tubular in shape, and has a bore therethrough to receive the finger of a user. The circumference of the pad is provided with a plurality of substantially flat working surfaces. The presently preferred embodiment is about two inches long, and has a hexagonal cross-section. Other preferred embodiments have a differing number of sides. The method of the invention is directed to removal of scratches from plastic surfaces through application of a suitable polishing composition to a pad and moving the pad across scratches or other imperfections to be removed. Among materials suitable for repair using the methods and apparatus of the present invention include eyeglasses, watch crystals, gauge faces, and compact discs.

Abstract: Polishing compositions and methods are provided for removing scratches and other imperfections from a variety of plastic surfaces in order to improve clarity and optical quality. Such polishing compositions include a solid polishing material, water, and an organic solvent containing undecane or any equivalent solvent. They can also include a stabilizing agent such as carnauba wax to keep the other ingredients suspended or otherwise mixed together. The polishing compositions are applied using buffing pads made from a variety of materials, including open-cell polyurethane, fleece wool, cotton, or synthetic materials. The compositions are applied by hand or using a hand-held rotary, orbital, or oscillating buffing machine, and are also compatible with existing scratch removal machines, such as robotic machines used to restore airplane windows.