This 3M Headlight Lens Restoration Kit is designed to improve the clarity of headlight lenses that have become yellowed cloudy or hazed over time. This kit does not require tools and is designed to work by hand. By improving the clarity of the headlight lens with this kit you improve the performance of the headlight and enhance the appearance of the vehicle. With the 3M Headlight Restoration Kit -39084 you can achieve professional results in the comfort of your garage. Headlight lenses have either a hard surface layer or a UV resistant coating on the outer surface of the lens. Once a lens has been degraded by the sun (UV light) and becomes yellowed or cloudy it is necessary to remove that yellowed layer in order to improve the clarity of the lens. The effort required to improve the headlight lenses will vary greatly by vehicle manufacturer year make model and headlight design. With the 3M Headlight Restoration Kit -39084 you will sand by hand to remove the yellowed layer from the headlight lens surface. Three additional sanding steps will follow to refine or reduce the sand scratches that are made when removing the yellowed layer. Finally 3M rubbing Compound and a foam pad will remove the fine scratches and deliver the final clarity on the headlight lens. This kit is designed to be done by hand no tools required. Masking tape is recommended.