Polywatch repair disaster
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  1. #1
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    Polywatch repair disaster

    Hi all,

    My Junghans Max Bill had a small scratch on top of the 12 marker so I decided to use some Polywatch on it. I have heard good things about the product, however after I applied the Polywatch, there is now a larger uneven and dented area instead of the small scratch! This is quite noticable because as the light shines through the glass, it makes a different shade compared to the rest of the face.

    I am devastated! Does anybody have any advice for me? Pictures are below.

    Thank you!
    Brian

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  2. #2
    Member Wolfsatz's Avatar
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    Picture Re: Polywatch repair disaster

    is the crystal actually plastic ?

    Wow.. im surprised. it is.

    last weekend I used 3M headlight restorer to get good results out of Vintage timex.
    Last edited by Wolfsatz; October 28th, 2016 at 18:14.

  3. #3
    Member dukembla's Avatar
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    Polywatch repair disaster

    Last edited by dukembla; October 28th, 2016 at 18:11.

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  5. #4
    Member X2-Elijah's Avatar
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    Re: Polywatch repair disaster

    Short of brushing off the rest of the crystal to the same amount, there's really nothing you can do, afaik. In theory, if you can melt extra plastic with the same refractive index on the pit and level it off (and without any trace goop in the transition between old crystal and new material), you could restore it to the original shape... But that's in theory. In practice, not feasible nor viable, and a sure-fire way to completely eff up the watch.

    (well - send it to Junghans for servicing and crystal replacement, but idk how much that will end up costing).

    (sidenote: this is why plastic crystals are bad and sapphire crystals should be the absolute standard for any watch above 300 bucks... If you want yellow tint, put yellow coating on a sapphire crystal's bottom).
    Last edited by X2-Elijah; October 28th, 2016 at 18:16.
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  6. #5
    Member Wolfsatz's Avatar
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    Re: Polywatch repair disaster

    "Just to follow up on this, several months ago I got a couple scratches on the crystal and decided to get some fine sandpaper and see if I could scrape off the coating where it had already been coming off from the scrapes. After about 1 hour of constant attention I successfully took off the sicralan and used Polywatch to buff out the crystal. I also rubbed a bit too hard and put some compression cracks in the crystal, but hey at least I know I can get the coating off. Anyways I am going to get a new crystal for it due to the cracks."

    From the thread quoted. given that this is coming from the automotive industry, I would guess that the 3M restoral or anything like it would work very well as long as it is done across the whole crystal.

    my results on a Timex

    20161022_143232 by Wolfsatz, on Flickr

    20161022_143243 by Wolfsatz, on Flickr

    20161022_144638 by Wolfsatz, on Flickr

    20161022_151652 by Wolfsatz, on Flickr

    20161022_134436 by Wolfsatz, on Flickr

    20161022_143131 by Wolfsatz, on Flickr
    ... What time is it? ...

  7. #6
    Member dukembla's Avatar
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    Re: Polywatch repair disaster

    There is nothing wrong with uncoated plexiglass.
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  8. #7
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    Re: Polywatch repair disaster

    To be clear, the moral of this story is not polishing an acrylic crystal is bad, but rather, polishing a crystal with a special coating is bad.
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  9. #8
    Member EnderW's Avatar
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    Re: Polywatch repair disaster

    Sucks... OP should contact Junhans repair to see what cost of crystal replacement is (should not be bad, I'd guess <$100).
    https://www.junghanswatchesusa.net/R...ter_ep_43.html

    Agree that the moral of the story is that polishing coated crystals is a bad idea (polishing crystals using polywatch is fine in absence of coating).

    As far as watch cost vs use of acrylic\plexiglass\hardlex - it is a conversation that has been had many times. If used as a design choice (due to warmth, feel and light processing), it is just fine (Speedmaster, Junghans Max Bill, Sinn 356 are fine watches using acrylic crystals). The decision to use coating is puzzling though. Then again, many don't like sapphire crystals w external ar coating for similar as it can scratch easily (coating, not sapphire)
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  10. #9
    Member Perseus's Avatar
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    Re: Polywatch repair disaster

    Thank you for sharing your experience. I've had my eye on a Jungans for a few years and the Sicralan coating gives me pause.


  11. #10
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    Re: Polywatch repair disaster

    If you can't live with the "dent" a new crystal may be called for.

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