How do you remove oxidation from plastic bumper on cars?

To remove oxidation from a plastic bumper, start by washing the surface with soap and water to remove dirt and grime. Next, use a plastic polish or a specialized plastic restoration product, applying it with a soft cloth in circular motions. For more stubborn oxidation, you can use a fine-grit sandpaper or a polishing compound, followed by a thorough rinse and drying. Finally, consider applying a UV protectant to help prevent future oxidation.