I have a 14 year old truck with 3M on the major areas. The headlights look brand new still and it completely prevented the oxidation/sun damage that normally occurs. I took the film off one of the lenses and was amazed at the difference between the 3M areas and the parts it missed. Clear glass vs yellowed and opaque. If you care about your vehicle spending a $1000 on 3M when its brand new is completely worth it.
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