Cloudy headlight lenses - best fix??

Discussion in '5 Series' started by Richyroos, Jan 14, 2020.

  1. Richyroos
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    Richyroos

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    What do you chaps find the best way to cure the cloudy headlight problem? I have tried all sorts, but it just seems to come back again! The fixes I have used are all very labour intensive too, loads of time spend rubbing and polishing, generally for not that much of an improvement!!

    The 3M kit does work, but I am wary of using that regularly, and it is safer taking the light out to do it rather than risk the paintwork.

    I haven't resorted (yet!) to trying Arm and Hammer toothpaste, any demon recommendations other than that??

    Rich
     
  2. bishbosh
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    bishbosh WARLORD Site Supporter

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  3. Richyroos
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    Richyroos

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    Thanks Bishbosh, very interesting reading! What you did, although the end result was worth it, did sound like great deal of effort was required to finally achieve it. It sounds a little like the 3M cleaning and polishing method, only better!! Having used 3M, I did find it quite effective, and it did improve my lights significantly.Not as good as your end result however!

    At the end of the day, either the light manufacturers need to design the lights, so that the lenses can be replaced - without the need to replace the whole headlamp, or else they ought to come up with a decent easy to use polish that actually works.

    Rich
     
  4. bishbosh
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    bishbosh WARLORD Site Supporter

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    To be fair my headlight lenses were pock marked and really needed a good refurbish. If it's just a bit of cloudiness then just a buff with a rotary polisher might suffice.

    I suspect that the cloudiness could be the plastic breaking down in the presence of UV rays. Especially if polishing the lenses has removed the UV coating.
     
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  5. slim_boy_fat
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    slim_boy_fat WARLORD Site Supporter

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    Not so much, did you see page 2 of that link? :whistling: That was 3+ a bit years ago and they're still good, although I do give that a coat of UV protectant every so often otherwise they will start to cloud over again.
     
  6. Postman
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    Postman

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    I use a product sold for rejuvenating aircraft Perspex on a pad with the DA sander. Works very well on our fleet, mind they weren’t too bad to start with. I’ll be home in a few days and will see if I can determine what exactly it is. Bought it at an air show in the States a few years ago, and am not that sure it has manufacturer details on the bottles. Two grades of compound. Doesn’t take more than literally a couple of minutes to get rid of cloudiness. Pitting may be a different ball game.
     
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  7. Richyroos
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    Richyroos

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    Thanks Postman, that sounds interesting! If you find a name on the bottles I would be pleased to hear what it is. I have used various things, from Brasso to the 3M kit, all work to a degree, my lenses are not pitted, just cloudy, around the edges mainly. It surprises me how abrasive some of the products have to be, to shift the clouding off. I am not sure how thick the lenses are, but a regular sanding off must be reducing the thickness each time, so eventually you will sand a hole in it!!

    Rich
     
  8. Postman
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    Postman

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    So far I've only used the green bottle with a DA. I bought a pad with it but it doesn't look particularly "specialised". A Google of the address on the back might bear fruit as to where you can get this stuff or indeed if it hints at any substitutes. As I said previously I bought this in the states at an air show. Was off a trade stand and haven't noticed it for sale since (I've been to the same show a number of years and I think I bought it circa 5 years ago). Works really well on the headlights. SWMBO has a lexus which were starting to go cloudy and a couple of mins had them as good as new. Masking took ten times longer than actually doing the job.
     

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