If the plastic is foggy or has a dingy yellow tint to it, it's time to restore the headlight ... If there is a brown/gray film on the inside of the bulb, it's time to change them.

The Headlight Lens Restoration System ... the development of a clear window film such as this is significant nonetheless. To better demonstrate the film's ability to reject heat, 3M had a table ...

But what about tinted headlights or tail lights? While window tinting is more common (and really ... not unheard of for owners to apply a similar film to their car's lights for the sake of aesthetics.

Recently, we got a chance to install its complete hood and tail lamp tint kit on a '12 Mustang ... Included are: two fitted pieces for the headlights, a pair of front and rear side markers ...