This is a great question. I wondered this too.
With some simple occasional UV protection care...even a 6-year old car (or older) can have their plastic lens covers look like new without having to do any kind of restoration at all.
What is your recipe for simple UV protection care, esp for the lights?
I was told to you Meguair's PlastX
but I have no idea if it needs any prep before using it.
PlastX does not make mention of any UV protection, rather, its designed to clean up the lens and polish the surface.
UV protection spray waxes can do the job (most last about 6-8 weeks), while regular liquid or paste waxes with stated UV protection offer better longevity (4-6 months).These are just a few
of the many spray and regular waxes with UV protection:Spray:
Meguiar’s Gold Class Premium Quick Wax
Chemical Guys Hybrid V7
Griot’s Garage Spray-on Wax
Optimum Spray Wax
303 Spray Wax & Quick Detailer
CarGuys Hybrid Wax Sealant
McKee's 37 Fast Wax
Chemical Guys Blazin' Banana Spray WaxRegular:
Meguiar's Ultimate Liquid Wax
Chemical Guys Butter Wet Wax
Aero Cosmetics Wash Wax All Wet
P21S Carnauba Wax
Car Guys Premium Liquid Wax
Meguiar's NXT Generation Tech Wax
Collinite No. 845 Liquid Insulator Wax.