Nulens Headlight Renewal Kit Designed to quickly and safely restore, maintain and protect all types of smooth, shiny plastic and acrylic headlights to crystal clarity. It easily cleans away yellowing and stains, and even buffs out unsightly hairline scratches, smudges, and flaws in a single step. The included PowerPlastic 4Lights® polish restores crystal clarity, leaving a tough protective, oxidation-inhibiting polymer layer to guard against future degradation from the elements.