I bought mine used It's a 2005. No problems yet. My 2003 g35 got terrible. Just curious if I can prevent it if it's prone to happening. What causes it the sun?

 

yup

 

find a local that knows what he is doing and get them polished with a cutting compound.. i think that's how they do it

 

Og get some fine grit sanding discs, 1000, then 2,000 and buff out w cutting compound... $$$ saved

 

This is only half the solution. the headlights need a new UV coating, otherwise they will be back to crap in no time.

 

The best stuff I've found to keep headlight lenses looking like new is 210 PLASTIC
CLEANER/POLISH.I bought some(spray)years ago from a dealer that sold Lamborghini&
Alfas.I've used it on my 77k Z since the car was new.The headlights look new except for the usual road pits.The company that makes 210(Sumner Laboratories)also has a pre-cleanerfor lenses tht need some restoration.I think this product is still available online.

 

are we just talking about headlight restoration?

I did these yesterday following this link https://my350z.com/forum/body-interi...v-coating.html

the first set of pics is my sisters 2003 corolla, before they looked horrible.
the second set is my 350z that didn't look bad but after i restored them they look great. the UV coating is what makes them look so clear. it is a clear coat that protects them from hazing i have since used the coating after using VHT nightshades in order to maintain the black finish for a long time.

 

My headlights still look pretty good. The car will be 9 years old on July 1 and I have done nothing but wax them all these years.

 

i was not able to buy my z new and maintain it to my standards, its amazing what a vehicle can look like with constant attention