1. Clean the headlight before starting and then mask the edges of the bonnet, fenders, radiator grille and bumper. 2. Depending on weathering, treat the headlamp surface with abrasive paper using a hand block or eccentric polishing machine. In the case of heavily yellowed headlamps, the 1,000 grit abrasive paper (coarse grain) should be used first. Then repeat this step with the 2,000 (medium grit) and 4,000 (low grit) abrasive paper until an evenly sanded surface is obtained. If the headlights are only slightly matt, the sanding can be skipped. 3. Remove the sanding traces with Headlight Polish 1 and the Heavy Cut Pad or the lambswool pad. We recommend using a rotary polishing machine and applying the polish at medium speed and medium pressure in a crosswise motion. 4. Polish the surface to a high gloss with the Headlight Polish 2 and the Thermo Pad. We recommend using a rotary polishing machine and applying the high gloss polish at medium speed and medium pressure in crosstalk. Before use, please observe the legal requirements for processing headlights in your country.