Now polycarbonate resin, rather than glass, is used for a material of headlights, and a various shapes of headlights exist. Headlights are important parts to determine the design of a vehicle. Deterioration and white turbidity of the hard coat layer of the surface of headlights are considered as a weak point of polycarbonate. It is common to polish and remove the hard coat with a water-resistant paper, buff the surface with compound to recover the transparency, and then apply a coating or paint on the surface to fix this problem. However, a product specially designed for headlights is needed to give the maximum effect to the material and conditions which are different from the painted surfaces. ECHELON for Headlight is formulated specially for headlights, and it prevents the deterioration of the coat itself and protects polycarbonate.