A few years ago, manufacturers started replacing glass
as a basic headlight material by plastic. Plastic
has many advantages such as allowing a more aerodynamic
design, looking a lot better and being far less
dangerous in the case of an accident.
The problem with plastic is that Ultra Violet light
makes it turn opaque and yellow. To counter this,
manufacturers apply a UV Protective coating on the
headlight when the vehicle is built. This coating
fails over time and when it does the plastic of the
headlight starts to yellow and turn opaque as it is
being affected by sunlight.
This process can reduce the amount of light that your
headlight emits by up to 50%. This makes it very
dangerous to drive at night since they are now
projecting a lot less light than they should and
visibility is reduced.
We can reverse this process by removing the dead UV
protective layer and making the plastic transparent
again. Once that is done, we
apply a new protective layer on the now restored
headlight to prevent it from turning yellow and opaque again.