[asianstutter]

I was wondering how often can I wetsand my headlights? 2-3 times a year?

[Otruba_843]

You should only need to do it once if they fogged up. After that put a permanent coating on the headlights. Just re-apply it every 1-2 years to be safe. Look at Opti-Lense.

[TOGWT]

Cause

Over the years, the polycarbonate headlight lens on any vehicle are subjected to heat and humidity - high Intensity discharge (HID) bulbs also bulbs also contribute to the deterioration of the polycarbonate lens as they emit heat from inside the lens, heat from the engine bay, radiation heat and humidity from the atmosphere, depending on climate and season Ultra violet (UV) radiation degradation causes oxidation and the lens becomes hazy and yellow. Road salt is also a yellowing agent, and then there is the effect of high-speed collision abrasion from dust, road grit and insects.

Effect

All of the above will cause the lens to become opaque causing lack of available road illumination. Hazy headlights aren't just a cosmetic issue; they’re a safety issue, too and replacing headlights can get extremely expensive, and is often unnecessary.



An extract from a TOGWT® Autopia Detailing Wiki Article - “Headlight Restoration” - http://www.autopia.org/forum/autopia...ml#post1506615


TOGWT® Autopia Detailing Wiki Articles, these informational resources contain everything you’ll ever want to know about automotive detailing and are an invaluable addition to your detailing knowledge base -. http://www.autopia.org/forum/autopia...yperlinks.html