Headlight restoration is the process of restoring the clarity and brightness of a vehicle's headlights that have become dull, cloudy, or discolored due to exposure to the elements over time. The restoration process typically involves the following steps:

1. Clean the headlights: First, the headlights are thoroughly cleaned with soap and water to remove any dirt, grime, and debris.
2. Sanding: A sandpaper is used to gently sand the surface of the headlights to remove the oxidized layer that has developed over time. The sandpaper grit used will depend on the severity of the oxidation, starting with a lower grit and working up to a higher grit.
3. Polishing: Once the headlights are sanded, a polishing compound is applied to the surface to further remove any oxidation and scratches. This helps to restore the clarity and smoothness of the headlights.
4. Sealing: Finally, a UV-resistant sealant is applied to protect the headlights from future damage and to maintain their clarity over time.

It is important to note that headlight restoration can be a time-consuming process and requires proper equipment and techniques. It is recommended to seek professional help for optimal results. Additionally, it is essential to keep the headlights clean and protected from the elements to prevent them from becoming cloudy or discolored again.