or plastic headlight restoration
is the act of refinishing
aged headlight lenses
that have become discolored or dull due to oxidation primarily due to UV light
and other environmental factors such as road debris impact (stones, sand, etc.) rain, and exposure to caustic
chemicals. Over time the protective hardcoat breaks down with UV degradation and wear from abrasion, etc. If left untreated the headlights will eventually develop small surface cracks, a condition referred to as crazing
. The effectiveness of the headlight in terms of light output measured in lux
can be significantly reduced. This condition which results in hazy and discoloured lenses is known for causing reduced night time visibility for drivers as the condition becomes worse. It is possible for cloudy and hazy headlights to be restored to a like-new condition and represents typically a far more economical alternative than replacing the lens.