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headlight lens hazy! can these be fixed?

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by Jackhop22, Feb 3, 2013.

  1. Jackhop22
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    Jackhop22 New Member

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    [Feb 3, 2013]
    my headlamps are quite hazy on the front lenses, what is best to do? can they be brought up nice, or is it simply new headlamps? it looks like a layer on the lens has actually melted away, i do have some spare lamps in the same condition, which i will probably have a practice on first, maybe wet sand it down and polish it and see if it comes up?

    was just wondering if anyone else has had this issue, as i have seen a few on the road that are the same!
    #1
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  3. southylad
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    southylad Member

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    [Feb 3, 2013]
    Have a look on ebay i got a two stage cut and polish for plastic lenses about £10 worked well on my passat
    #2
  4. GeoffDunk
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    GeoffDunk Active Member

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    [Feb 3, 2013]
    I had mine clay barred by a proffesional when he detailed my car. both from and rear lenses were perfect once he had finished with them.
    #3
  5. Jackhop22
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    Jackhop22 New Member

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    [Feb 3, 2013]
    okie doke, i work for a main dealer with a very good valet bay, which has all the goodies i need! will have a play with one of my spare lamps tomorrow, and will update how it goes on here!
    #4
  6. krisavant
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    krisavant 4th set of a wheels in a year

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    [Feb 3, 2013]
    If your brave enough, 2000 grit wet & dry, compound machine polish then final stage polish with soft pad.
    They will look brand new.
    #5
  7. AlexGSi2000
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    AlexGSi2000 Well-Known Member VCDS Map User

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    [Feb 4, 2013]
    I tried wet and dry along with polishing on my headlights, but it seemed the actual plastic had started to turn a yellowish colour over 120,000 miles.
    I ended up replacing the units for some "Depo" ones which were purchased for £45/ea on ebay - they have been on the car for about 6 months now and are perfect, really freshened up the front end!
    #6
  8. Malfuss
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    Malfuss Member

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    [Feb 4, 2013]
    Toothpaste works as well!
    #7
  9. Jackhop22
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    Jackhop22 New Member

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    [Feb 9, 2013]
    #8
  10. dpbayly
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    dpbayly Member

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    [Feb 9, 2013]
    I carried out the sanding and polishing method on a few of my previous cars and it really dose work well including restoring the yellowing.

    Here's a few of the past results:

    Mitsubishi FTO

    Before (de-laminating and yellowing)
    [​IMG]

    After (like new)
    [​IMG]

    My 540I (had bad motorway stone chips)

    before
    [​IMG]

    after
    [​IMG]

    some of the in between process

    wet flatted back (start with 600 then 800 then 1000 then 1500)
    [​IMG]

    after all the flatting they looked like this
    [​IMG]

    once you have them looking like this i used a mop (machine polisher) but the same effect can be had by hand just takes elbow grease along with a cutting compound.

    [​IMG]
    #9
  11. Jackhop22
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    Jackhop22 New Member

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    [Feb 9, 2013]
    That's amazing, great post! Cheers mate... Gonna get on mine again tomorrow, hopefully get them as nice as yours!
    #10
  12. dpbayly
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    dpbayly Member

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    [Feb 9, 2013]
    No worries,

    Get the worst off with wet 600 once you have it nice and smooth then work at it with wet finer stuff till it looks like my last pic before I polished then its just compound and elbow grease till it looks mint, with the wet n dry paper add a bit a fairy liquid to the water helps let the paper slide over the lens and stops the paper clogging.
    #11

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