Most drivers assume that a car will naturally develop clouded, yellowheadlights after being on the road for a few years or more. This is a result of wear and tear on the vehicle headlights, and not a natural occurrence. Drivers don’t have to live with unattractive, cloudy, or dim headlights. They can take care of this problem with a few commonly found products and some time. Of course, drivers are able to take their cars to an auto detailer or mechanic to have their headlights resurfaced.
However, it is possible to do this at home with some small effort. Before heading out to the store to purchase the products needed to clear up a cloudy headlight, make sure of the specific cause of the problem. Drivers will usually only need sandpaper, headlight lens polish, headlight lens sealer, water, detergent, and a clean cloth. There are plenty of places to find these products, including a hardware store, car parts store, or on the auction site, eBay.
Causes of Clouded Headlights
Drivers will soon learn that there are a number of causes of clouded headlights. Each cause has a different corrective option to clearing up the clouding and making the headlights bright and shining again. Once the driver has determined the problem that has led to a cloudy lens, it can be fixed. All drivers need to do is take the time to apply the corrective fix to their headlight lenses.
Oxidation
The most common cause of a clouded headlight is oxidation from the polycarbonate lens simply being exposed to the oxygen atmosphere of our planet. In addition, these lenses develop numerous fine cracks when exposed to UV radiation, making the clouding appear even worse. The lenses appear yellow and cloudy when this happens. Luckily, the oxidation occurs only at the top layers of the headlight lens and this can be fixed with some effort and a bit of sandpaper.
Road Damage
Headlights can also become cloudy in response to heavy road damage when small rocks and debris fly up and pit the polycarbonate lenses. When a car travels down the road at high speeds, its wheels kick up lots of small gravel. This gravel can impact the front end and headlights of the car traveling behind it. Road damage looks like numerous small dents and pits in a polycarbonate lens and a white, frosted appearance. It can be repaired with some care and polishing if not too bad.
Dirt and Chemicals
A car that had been on the road for a while will usually develop a thin film of dirt and chemicals. Over time, this mixture can become hardened and be difficult to remove with a quick rinse at the car wash. This film is opaque and can dim the lights or even make it hard to see on the road. A more involved washing with some oil, detergent, andnail polish remover will help get this film off the headlights.
Water Vapor
Sometimes, the inside of a headlight develops condensation from high moisture content in the trapped air. When the vapor condenses inside the headlight and collects on the polycarbonate lens, it can scatter the light pattern, diffusing the light on the road. This makes water condensation an unsightly problem and a potentially hazardous one. Fixing the headlight requires opening up the assembly and clearing out the water.
Removing Oxidation from Headlights
As oxidation is the result of exposure to the elements and UV radiation, often the easiest way to get rid of the problem is to remove the top layer of the headlight assembly. This is done using successively finer grades of sandpaper. Drivers will want to clean their headlights with plenty of soapy water and allow them to dry. Purchase masking tape, 900 grit, 1,000 grit, and 1,200 grit sandpaper, and a plastic lens polish and sealer.
Sanding the Lens
Mask off the area around the headlight lens with the masking tape to protect the car paint. Drag wet 900 grit sandpaper across the lens in a left and right motion. Continue this process until the entire lens is dull and frosted. Sand the lens again with the 1,000 grit sandpaper. Make sure to keep this paper wet too. Continue sanding the lens with this grit until it feels smooth. Move on to the 1,200 grit sandpaper last, sanding the lens until it feels smooth over the entire surface. Keep the sandpaper wet as you work.
Polishing the Lens
Rinse off the headlight lens and allow it to dry completely. Buff the surface of the polycarbonate lens with the headlight polish on a microfiber towel. Continue buffing the lens in a circular motion until the entire surface is smooth and clear.
Sealing the Lens
Rinse off the headlight lens again with clean water and allow it to dry. Apply a layer of lens sealer to the surface of the lens in a left to right motion using a brush or clean towel. Allow the headlight to dry for about ten minutes.
Other Options to Clear Up Headlights
Drivers have other options to clear up headlights depending on the cause of cloudiness. Headlights with some pitting and frost from road damage can be polished with atoothbrush and toothpaste. There are gentle abrasives in toothpaste that will help sand the polycarbonate. Rinse off the toothpaste, allow the lens to dry, and then cover with a lens sealer. Clean a film of dirt and chemicals from the headlights with some cooking oil to loosen the dirt, clean with water and detergent, and remove any stubborn layers with nail polish remover and some scrubbing. Drivers can end with a light buffing using the car lens polish.
(Source: eBay Motors)