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Thread: Removing cotter pin stains from back of board

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    Tokie Owens wasorrell's Avatar
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    Default Removing cotter pin stains from back of board

    Hi everyone. I'm restoring a Nishijin Front Overflow my father brought back from overseas in 1973 (it's probably from around 1970). This thing is in rough shape as it has been sitting for a very long time, but I've managed to get it completely torn down and am getting it ready for cleaning and reassembly.

    The track cotter pins have left dark marks on the back of the playfield board from rust and general oldness. Since they were hammered into the board they are not just superficial marks but go down in a bit. I have sanded it down about as far as my courage will let me, but since it is plywood I don't want to completely remove a layer. Any tips on lightening up the color of those marks? I'm not entirely sure I'll be able to make the new cotter pins/wire overlay the exact spots the old ones were (same holes though obviously).

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    Pachi Puro Moparformances's Avatar
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    Default Re: Removing cotter pin stains from back of board

    if your trying to get every bit out a file set like this may work..

    http://www.amazon.com/Piece-Of180mm-.../dp/B00KDOARQA

    or try using a dremel with a round point file or stone..

    please post a few pictures of your machine before during and when complete..

    and of course

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    Pachi Puro mxfaiman's Avatar
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    Default Re: Removing cotter pin stains from back of board

    Personally I don't worry about those stains in the back. A: no one sees them usually B: they don't effect how anything mounts.

    Also to reinstall the track other members and myself use 18 gauge stainless steel safety wire. Loop it through the track, feed it through the hole, twist the wire, pull & feed into one of the existing cotter pin holes, then staple down and smear glue over. (easier to have 2 people to do this right)

    Also to Pachitalk!

    100 machines and counting...

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    Tokie Owens wasorrell's Avatar
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    Default Re: Removing cotter pin stains from back of board

    Thanks very much - I've needed an excuse to get a dremel tool and this is as good as any. I have an insane number of pictures so I'll be sure to post when done.

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    Tokie Owens wasorrell's Avatar
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    Default Re: Removing cotter pin stains from back of board

    I agree it may be over the top trying to make the back look perfect. This particular machine has a lot of sentimental value for my dad, as he brought it back with him when he was stationed in Korea and I remember playing with it when I was a kid. He had it sitting in his garage for 20 years starting in about 1983, and I've had it in my work shed since then. As far as he knows it's lost and gone forever so I want to make it a show piece for him.

    I like the idea of using the wire - I wonder if I can get it in 18 gauge brass? I'm replacing all the fasteners with brass screws so I'd like to keep the theme.

    Appreciate all the good advice on this site - carry on!

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    Pachi Puro mxfaiman's Avatar
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    Default Re: Removing cotter pin stains from back of board

    Quote Originally Posted by wasorrell View Post
    I like the idea of using the wire - I wonder if I can get it in 18 gauge brass?
    It won't be strong enough. Those tracks take quite a beating and it takes a good amount of force to pull them tight to the playfield.

    100 machines and counting...

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    Tokie Owens wasorrell's Avatar
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    Default Re: Removing cotter pin stains from back of board

    Quote Originally Posted by mxfaiman View Post
    It won't be strong enough.
    Thanks for that - it's nice to have a community of folks who've been there to advise.

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