How to Repair Plastic Car Light Lenses

1). Mix warm water and a mild dish detergent into a bowl or bucket. Soak a washrag in the solution and wet the lens.
2). Sand the wet lens with 1500 grit sandpaper. Do not let the lens dry; reapply water as necessary to keep the lens wet while you sand. Sanding the lens will remove scratches and any haze buildup on the lens.
3). Spray a specialized cleaner, such as FW1 Fast Wax, onto the lens. Rub the wax in a circular motion across the lens surface to spread it evenly. After ten to twenty seconds, buff the wax with a clean cloth to remove remaining haze from the lens.
4). Cover and buff the lens with regular car wax or lens polisher if needed to remove any remaining haze or to add shine to the finished lens.