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  1. #1
    Join Date
    Apr 2009
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    Rutherford
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    Unhappy Shellac finishing problem PLEASE HELP

    Hi

    I am currently finishing a guitar with hardened white shellac. I have then buffed it with a polishing compound. Everything was going fine until I stupidly buffed through the finish in one spot. Taking my medicine for the stupidity, I have taken the area back to bare timber to re-apply the shellac. I now find that the shellac will not take to this area. Can anyone suggest a solution to this problem, please?


    Thanks Tony

  2. #2
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    Jul 2003
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    geelong
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    Post

    What was in you polishing compound? silicone?

  3. #3
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    Apr 2009
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    Rutherford
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    Default

    Quote Originally Posted by nine fingers View Post
    What was in you polishing compound? silicone?
    I have no idea. it was sold to me as "polak" from Aussie Buff. I have sanded well beyond the damaged area and the shellac won't take there either.

  4. #4
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    Feb 2008
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    Victoria
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    Default

    Quote Originally Posted by nine fingers View Post
    What was in you polishing compound? silicone?
    First thing that came to my mind too.
    Cheers,
    Jim

  5. #5
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    Feb 2008
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    It think it "polak" is a polishing and waxing compound. It is sold around the world under various names. It maybe even rebadged porzelack.

    Think you guys are right ... contains silicon ... it may also contain teflon ....

  6. #6
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    Apr 2009
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    Rutherford
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    Quote Originally Posted by The Bleeder View Post
    It think it "polak" is a polishing and waxing compound. It is sold around the world under various names. It maybe even rebadged porzelack.

    Think you guys are right ... contains silicon ... it may also contain teflon ....

    Ok guys, thanks. If it is silicone that caused it, how can I fix it?

  7. #7
    Join Date
    Nov 2008
    Location
    Hunter Valley
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    Default

    Removing silicone? best of luck, you'd need a heavy duty solvent....even then

    FYI.....EEE Ultrashine is the suitable cut and polish compound for Hard Shellac, works beautifully........

  8. #8
    Join Date
    Feb 2008
    Location
    Victoria
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    Default

    I had a bit of a search on the net and the best advice seems to be that whatever solvent you try throw the rags etc away after one sweep otherwise you keep recontaminating.
    good luck,
    Jim

  9. #9
    Join Date
    Jan 2005
    Location
    Colyton, NSW
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    0

    Default

    Car spray painters use PrepSol. Designed to remove waxes etc before re-spraying.
    John

  10. #10
    Join Date
    Apr 2009
    Location
    Rutherford
    Age
    67
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    5

    Default

    Thanks to all for your advice. It is much appreciated.

    I again stripped back the shellac from the area and thoroughly cleaned it with alcohol. At first I had similar problems, but gradually I was able to build a reasonable amount of shellac over the area. After later rubbing back I now have a smooth surface that the shellac is covering as well as the rest of the surface. The damaged area is a little lighter in colour, but that doesnt worry me too much. If I am not happy with the final result, I will take it all back and try your suggestions.

    Thanks

    Tony

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