There can be many causes of auto headlight deterioration. Auto headlights are made of polycarbonate plastic with a protective layer that makes it stronger, but it's porous that makes it absorb sunlight, acid rain, and other pollutants as well.
There can be many causes of auto headlight deterioration. Auto headlights are made of polycarbonate plastic with a protective layer that makes it stronger, but it's porous that makes it absorb sunlight, acid rain, and other pollutants as well.