Polishing agents are substances used to enhance the appearance and smoothness of surfaces. They work by removing small imperfections, dirt, and oxidation, resulting in a shiny finish. Commonly used in various industries, these agents can be found in products for metals, plastics, and even wood. These agents come in different forms, including liquids, pastes, and powders. They often contain abrasives or chemical compounds that help achieve the desired effect. Examples of polishing agents include cerium oxide for glass and aluminum oxide for metals, each tailored for specific materials and applications.