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Old 11-04-2016, 07:31 PM
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Default Cutting and Buffing headlights.

This has been brought up a few times now. Some people use toothpaste, some people use sandpaper and cut and buff, some people use the ebay or Repco light rejuvenation kits.

I have mentioned a heap of times this is not good for them and over time they will just get worst each time you do it so it's much better to just polish or wax your headlights when you do your car when there new and keep them clear rather then try and fix them later. This will stop them going chalky without removing all the UV protection.

Anyway this info is mainly for the guys with the Y62s.

I know a few people who have had ARB bullbars fitted to the new Y62s and have had issues with the headlight protectors scratching the headlights as you cant have both due to the bottom of the projectors rubbing in the lights once the factory bar was removed. I also know that ARB contacted the clowns at Nissan and Nissan told them they can cut and buff there headlights and this will solve the issue as the UV protection goes all the way though the lens. This is NOT true. So for anyone out there who has had this done be warned your lights will fade and go chalky over time due to the UV protection being removed or at the very least thinned out after it's been buffed.

This is an email directly from Koito's General Manager and grandson of Mr Koito the manufacturer of the lights in your Nissan and around 60% of cars world wide. As you can see by the email he is Japanese so the English isn't the best.


Dear ****,

It was good to talking to you.

Regarding to the subject, from our (Manufacturer point of view) buffing and polishing
is not recommended.

The reason and background is below.

-Outer lens has hard coating treated.
-The coating is to protect Lens from some small scratch and also from UV.
-The material is our special blended one and not in the market.
-The coating should have done in proper machine, certain thickness and cured with
certain temperature / environment (Clean room).
-However after buffing and polishing, we believe that it is very difficult for the repair
shop proceed above same treatment with proper material/processes.

So I am afraid that you should tell them to replace not repair the lamps.

Best Regards,
Hilo KOITO
------------------------------------------
Hiroaki (Hilo) Koito
Deputy General Manager
European Operations

International Operations HQ
Koito Manufacturing Co., Ltd.
E-Mail : h-koito@koito.co.jp
+81-54-345-4416 (Office)
+81-54-345-4959 (Fax)
+81-3-3443-7111 (Tokyo Office)


Mods may want to throw this in the Y62 area but it does really relate to all plastic headlights in Patrols. This is also the reason why cheap HID kits in reflectors destroy the lenses on the inside. This is another reason why HID is fitted in metal projectors with glass not plastic lenses internally.

Cheers Mick
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Last edited by Mick..; 11-04-2016 at 08:50 PM.
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  #2  
Old 11-04-2016, 08:06 PM
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Good information Mick.

This is also interesting to me as my wife's near new Honda is starting to get that chalky look on the top of the headlights. We bought it as a Dealer Demo car and I could tell that they buffed the crap out of it to make it look great for sale. Probably polished right through the UV protective coat on the lights in the process.
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Old 11-04-2016, 08:53 PM
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That wouldn't surprise me mate. The amount of times I hear of panel shops and dealerships cutting and buffing lights only to have them look a lot worst a few months later. I'd say they might have.

I would assume Hella, Stanley, Depo etc all use the same processes as Koito meaning this issue could pop up with any headlight.
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Old 14-03-2017, 03:27 PM
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My experience with the headlights of my Honda Civic is mentioned in my blog post: urShadow's Blog: How to get your Car's Sand Blasted Headlights Cleaned in Riyadh, Saudi Arabia (Updated)

I am using the same protection on my Nissan Patrol
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