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Thread: filing plastic

  1. #1
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 9,302
    I'm Andrew.

    Default filing plastic

    Can someone tell me if there is a specific type of file for plastic. I'm trying to file a neat square edge on some plastic.

    Thanks

    A
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  2. #2
    Join Date: May 2011

    Location: Glasgow

    Posts: 7,718
    I'm Brian.

    Default

    I would just use a fine file Andy . It will probably block up with the plastic so keep a fine wire brush handy to clean it . Take your time and make sure the piece of plastic is well secured .
    Regards
    Brian

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  3. #3
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,624
    I'm Geoff.

    Default

    It depends on how much you want to take off. Files rather tend to rough the surface up too much for my liking on plastic. I've used fine 400 grade wet/dry paper glued to strips of hardboard rather than a file. You can then use 600 grade to finish, it leaves an almost polished finish.

  4. #4
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 9,302
    I'm Andrew.

    Default

    Quote Originally Posted by brian2957 View Post
    I would just use a fine file Andy . It will probably block up with the plastic so keep a fine wire brush handy to clean it . Take your time and make sure the piece of plastic is well secured .
    Quote Originally Posted by walpurgis View Post
    It depends on how much you want to take off. Files rather tend to rough the surface up too much for my liking on plastic. I've used fine 400 grade wet/dry paper glued to strips of hardboard rather than a file. You can then use 600 grade to finish, it leaves an almost polished finish.
    Gents, your both Scholars and Saints! I've got that stuff in my garage so will take you up on your advice, again many thanks.
    SS
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  5. #5
    Join Date: Jan 2013

    Location: Carlisle - UK

    Posts: 1,956
    I'm Ken.

    Default

    What type of plastic?
    A hard type like Acrylic or Polycarb, or something softer like Nylon or Polyprop?
    Generally a fine file generates too much heat on the plastics surface and can clog, a sharp coarser file works better, especially on the softer types.
    Finishing with wet/dry if a smoother finish is required.

  6. #6
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 9,302
    I'm Andrew.

    Default

    Quote Originally Posted by Qwin View Post
    What type of plastic?
    A hard type like Acrylic or Polycarb, or something softer like Nylon or Polyprop?
    Generally a fine file generates too much heat on the plastics surface and can clog, a sharp coarser file works better, especially on the softer types.
    Finishing with wet/dry if a smoother finish is required.
    Blimey, this was for the G99 restoration project. This one is now "to-bed" so to speak and I'm on with the next one. Thanks for the advice anyway Ken.
    SS
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