How to keep headlights looking new?

I have a question. I have a friend with really hazy headlights. I polish it and then protect it and it looks better, but after a few months it just hazes up again. Is there something i can do so the problem doesn't keep coming back? He was thinking wetsand and reclear, but i'd say i find out first.


BEFORE:



AFTER:

 

Also interested in an answer to this. The wifes headlights look very similar to this...

 

Clean them weekly with Plexus and seal them with the sealant of your choice, that seems to help.

 

Did you do a PrepSol wipe down?

 

What's prepsol? Nothing to really permanently fix the problem? My friend isn't the type of person who is going to want to be wiping down the headlights weekly.

 

Prepsol is a wax and silicone remover that autobody shops use. Im not sure what his reference to the wipedown has to do with this...

 

i always use wax or sealant on headlights... and keep maintaining it unless you get a clear 3m cover on it....

 

8. Removing Oxidation or scratches from Vehicle headlights, Fog or Brake lights [/B](polycarbonate)
In the late 1980’s, vehicle manufacturers changed the lighting lens system materials used for head lights from glass to Lexan (plastic ) to protect expensive lamps (headlight assemblies range from 500-$700+) from flying stones and road debris. The lens starts to exhibit an opaque appearance and then a yellow hue on the outside of the lenses and can severely restrict the amount of light reaching the road. Original equipment material (OEM) suppliers started to add a UVR protection to the surface of the lens in an attempt to reduce this condition and prolong the usable life of the lens.

The lens has a silicone-based coating applied to its outer surface, some manufacturers apply two different types of coatings to the outer surface of the lens, these coatings are mainly for UVR protection, but are also for impact and abrasion resistance, once the coating (s) fail the lens surface will occlude (clouding or yellowing)
While most of the cloudiness is on the surface, severely discoloured lens cannot be brought back to optical clarity. If you live in a southern state, this discoloration can become noticeable in as little as two-years.

Application Methodology:
•Use a solvent type cleaner (Klasse or Zaino All-In-One) if this does not remove the oxidation use a plastic polish
• Meguiar’s PlastX contains a microscopic diminishing abrasive, which requires a little pressure when applying it to enable these abrasives to remove the discoloured plastic and expose new plastic. Or Renovo Plastic Cleaner
•Plastic Cleaners can be used to clean and condition Perspex as well as flexible plastic but is not suitable for use on glass.
•Prior to application of a plastic polish ensure that the window is clean and free from dust particles by washing with a soft cloth and warm water.
•It is not advisable to use cleaning detergents on plastic.
•Shake the bottle thoroughly. Plastic polish can be hand or machine applied
•Using a random orbital buffer with a 3.5-inch backing plate and a 4-inch (LC White) polishing pad or a terry cloth applicator
•Place a small dab (about ½-inch diameter) of plastic polish on the foam pad or applicator.
•Place the pad on the lens surface and turn on the machine (speed #4)
•Polish the lens repeatedly in a left-to-right and an up and down pattern.
•Continue polishing until all the polish is gone
•Wipe the lens with a damp Microfiber towel
•Inspect the lens, repeat the polishing process 2-3 times as necessary
•Plastic polish will not remove clarity defects that are within the plastic but it will remove external/surface scratching and oxidation (yellowing)

Alternative products-
a) Novus 1 - gently cleans all plastics without scratching, leaves a lustrous shine that resists fogging, repels dust, and eliminates static.
Novus 2 - removes fine scratches, haziness, and abrasions from most plastics (exceptional for removing scratches from Plexiglas). Use repeatedly and restore faded and discoloured plastics.
Novus 3 -removes heavy scratches and abrasions from most acrylic surfaces. Contains abrasives, not for use on eyeglasses, polycarbonate, or coated plastics, final finishing also requires the use of Novus 2 Custom Plastic Fabricators and Distributors - Modern Plastics.

b) This simple, easy to use product cleans, brightens and protects even the dullest headlights, also works great on taillights, the plastic windows in convertible tops, instrument panels, and motorcycle windscreens.DA2030 Shine Restorer Protector- Shine Restorer Protector - DA2030

c) Lensrenew - Lens Renew - New Life for Car Lenses

Wet-sanding- some OEM headlights have a coating applied this coating does not respond well to sanding test a small inconspicuous area. If the plastic starts to turn white, do not sand the lenses. Use a plastic polish (see Plastic Polishing)

When sanding the lens ensure that you sand in one direction only. It's important to keep the lines as straight and uniform as possible as they are often still slightly visible even after polishing. Providing the lines are in one direction you’ll never notice them once the acrylic coating is evenly applied. Otherwise random sanding lines will distort the light beam and become a distraction

Product specific - Rightlook.com makes dull, yellowed headlights look like new with Clear Lights Headlight Restoration Kit. This simple, easy to use system cleans, brightens and protects even the dullest headlights. The Clear Lights Kit also works well on taillights, the plastic windows in convertible tops, instrument panels, emergency vehicle light bars, and motorcycle windscreens. (This is a professional product for multi-use, retail approx. $200)

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