Headlight coating

Technical questions and answers about the Mazda Bongo

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AeroNut
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Headlight coating

Post by AeroNut » Fri Jul 15, 2011 6:50 am

I have one of my headlights with 30% of the coating removed.... I don't know how this has happened. It was like this when I bought it.

Is there a means of removing the coating altogether? possibly recoating it with what ever it is?

It's a late model 2001 HiD type.

I have tried the perspex polish but that don't seem to touch it.

Any suggestions........

Thanks in anticipation....

Terry
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daveblueozzie
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Re: Headlight coating

Post by daveblueozzie » Fri Jul 15, 2011 8:03 am

Try T-CUT that seems to work but you need a lot of elbow grease to go with it.
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stuc
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Re: Headlight coating

Post by stuc » Fri Jul 15, 2011 8:35 am

you could use a polishing machine, and there is a product out to re apply this coating. It may be Wurth but not 100% sure. This coating is a UV Coating to protect the plastic from deterioration.
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Re: Headlight coating

Post by rita » Fri Jul 15, 2011 9:22 am

Hi guys,

A pal of mine had problems with tarnished head lamp lenses.
He told me he cured it by using bicarbonate of soda and a nylon scourer.
He then applied Crystal Disc cd repair fluid using a soft cloth.
He said it restored them like new and will probably stop the yellow coming back,as they are now protected by the Polymer in the cleaner.

Ps he also said,that the tarnishing is caused by the UV coating wearing off.

Cheers
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Re: Headlight coating

Post by alant54 » Fri Jul 15, 2011 8:08 pm

rita wrote:Hi guys,

A pal of mine had problems with tarnished head lamp lenses.
He told me he cured it by using bicarbonate of soda and a nylon scourer.
He then applied Crystal Disc cd repair fluid using a soft cloth.
He said it restored them like new and will probably stop the yellow coming back,as they are now protected by the Polymer in the cleaner.

Ps he also said,that the tarnishing is caused by the UV coating wearing off.

Cheers
Beware of nylon scourers.... :shock: ....some of them are vicious enough to damage stainless steel......I can recommend Fenwicks Windowise for cleaning your headlights and your wind deflectors and your caravan windows if you have got one..... :roll:
If you type in Fenwicks into google you will find their site.....the stuff really does work because I use it myself....not on commission by the way..... :)

Alan
Alan...still plodding on....!
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Diplomat
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Re: Headlight coating

Post by Diplomat » Fri Jul 15, 2011 10:09 pm

It needs something that dissolves the coating but not the lens.

I took a gamble and used paraffin (white spirit is more or less the same) to soften and lift the flakes of film but it needed a gentle rub with toothpaste to completely remove the yellow tinge.

As a general rule, I never use abrasives to clean anything. All they do is provide a key for future dirt to take hold.

Toothpaste is a fairly friendly abrasive in comparison to most of the household cleaning products.


Frank
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nicstrike
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Re: Headlight coating

Post by nicstrike » Sun Jul 17, 2011 5:16 pm

rita wrote:Hi guys,

A pal of mine had problems with tarnished head lamp lenses.
He told me he cured it by using bicarbonate of soda and a nylon scourer.
He then applied Crystal Disc cd repair fluid using a soft cloth.
He said it restored them like new and will probably stop the yellow coming back,as they are now protected by the Polymer in the cleaner.

Ps he also said,that the tarnishing is caused by the UV coating wearing off.

Cheers

for cleaning the headlights (and wind deflectors) i use meguiars plast-rx (http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT). it brings them up a treat as it is specifically for plastics but as the coating is long gone from the headlights it means a fairly regular polish is required. a coating to save this operation would be great. where is this this fluid avaiable from? oh , our headlights tint off to a greeny sort of colour!
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nicstrike
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Re: Headlight coating

Post by nicstrike » Sun Jul 17, 2011 6:46 pm

after a bit of rummaging...http://cgi.ebay.co.uk/Digi-Coat-UV-Prot ... 256537acc1 (follow link to makers site too)

bit pricey but it could work if a few local owners get together maybe?
rita
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Re: Headlight coating

Post by rita » Sun Jul 17, 2011 6:52 pm

nicstrike wrote:
rita wrote:Hi guys,

A pal of mine had problems with tarnished head lamp lenses.
He told me he cured it by using bicarbonate of soda and a nylon scourer.
He then applied Crystal Disc cd repair fluid using a soft cloth.
He said it restored them like new and will probably stop the yellow coming back,as they are now protected by the Polymer in the cleaner.

Ps he also said,that the tarnishing is caused by the UV coating wearing off.

Cheers

for cleaning the headlights (and wind deflectors) i use meguiars plast-rx (http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT). it brings them up a treat as it is specifically for plastics but as the coating is long gone from the headlights it means a fairly regular polish is required. a coating to save this operation would be great. where is this this fluid avaiable from? oh , our headlights tint off to a greeny sort of colour!
Hi,you could try ebay this one is just finished....
http://cgi.ebay.co.uk/Crystal-Disc-CD-C ... 0537437914

Or a camera/photo shop..
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Kincaid
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Re: Headlight coating

Post by Kincaid » Fri Jul 29, 2011 8:44 pm

I've found a few Youtube 'detailing' vids prescribing wet sanding at 1000, then 1500 then 2000 grade, then buffing with a rubbing compound then using the aforementioned plast RX polish. The results on the vids looked brilliant but I'm concerned that the wet sanding would cause bigger issues. What do you think?
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Re: Headlight coating

Post by Yamaha » Sat Jul 30, 2011 12:07 am

I would have thought that judicious use of a hairdryer should soften it - then peel it off?

Same for those stupid ones on the mirror glasses.

Mike
Curator of the Bridgwater Motorbike Collection

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stuc
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Re: Headlight coating

Post by stuc » Sat Jul 30, 2011 12:09 pm

I have sanded and polished scratches out of many headlamp lenses and not caused any problems. Obviously the UV coating has gone and can be re applied, but if not just keep them waxed up and it would take years for the plastic to deteriorate. Just do it and dont worry about it.
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