if its on the out side in most cases it is they sell a cleaning kit at the parts store that works good
The dealer, EBAY, do a google search..... they are used for roads
Your local auto parts store should have a kit available to restore the clear plastic lenses over your headlamps.
If they are designed for plastic they should not have any abrasives in them, so they should be safe, However if you are trying to remove cloudy oxidation from your thermoplastic /acrylic/ polycarbonate headlight lens they will not work.
There are clear turn signal lenses available from a Chrysler LeBaron and the PLymouth Acclaim of the same vintage. The lenses integrated into the bumper are fully clear unlike the Spirit amber color. The turn signal lenses next to the headlight are clear with just the side reflectors being amber.
You can now get a lens polishing kit at an auto store, like auto zone.The fogginess of your car's lens is actually a clear coat that is applied to the plastic, to retard the UV rays from damaging the plastic. Once that clear coat is burnt from the solar rays, it becomes foggy.Polishing your lenses will remove this old coat and you will need to apply a new coat. The kits available have all the materials you need to fix it. It will not be as good as nes, but the improvement will be noticeable. You do not have to remove your lights. quote taken from yahoo answers
The headlight assembly can be changed, but not just the actual clear lens on the front. See "Related Questions" below for how to remove the headlight assembly, and also how to clean them
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It depends on where the fogging is. If it is on the inside your are out of luck. If it is on the outside you may be able to purchase some plastic polish and correct the issue. Your best bet is to replace the headlight housings. According to two guys garage you can use toothpaste to clear the lenses, however don't recomend doing this unless you are sure of what toothpaste to use which I will write later.
You can buy just the plastic housing, but not just the clear plastic. The housing is sealed for waterproofing.
Not all... Some spectacle-makers use plastic lenses instead of glass.
Yes, contact lenses are considered liquids on a plane and must be packed in a clear, resealable plastic bag in containers of 3.4 ounces (100 milliliters) or less.
No, clear lenses cannot be changed to transition lenses. Transition lenses have a special treatment that reacts to UV light to darken in sunlight, which cannot be added to regular clear lenses. You would need to purchase new transition lenses to have this feature.