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Fixing glue gap in body

Discussion in 'Luthier's Corner' started by Wasted4440, Apr 11, 2015.

  1. Wasted4440


    Feb 3, 2015
    Hi everyone,
    While carving away my belly and arm cutaways, I noticed that in both areas there is a seam of pesky glue that is visually unpleasant. I glued my original blank up by placing two sets of pau ferro and maple together, gluing them both in a vacuum bag, and then attaching them to a mahogany core. All this was done with Titebond Original.
    The bottom of the left picture shows the result I'd normally expect, but it almost looks like there was a very thin pocket full of glue that formed between the pau ferro and maple. Does anyone have any suggestions on removing it? Might there be a way to dissolve it with something or heat it, and if so would there be a good way to fill in the resulting gap that would take finish well? Thank you very much!
  2. lbridenstine


    Jun 25, 2012
    I could be looking at it wrong, but to me that doesn't look like a gap, it just looks like the pau ferro might be sitting up a little higher than the maple and the glue squeeze-out is just not smoothed out yet.
    michaelwayneharwood likes this.
  3. Wasted4440


    Feb 3, 2015
    Hmmm, that could be, it's just a bit disconcerting that appeared right when I got to that layer with an angle grinder, and hasn't disappeared since I've been scraping the cutaway smooth.
  4. Lonnybass


    Jul 19, 2000
    San Diego
    Endorsing Artist: Pedulla Basses
    Is it flush with the surface, or raised at all? Is the pau ferro/maple joint in the picture perfectly flat? Just trying to get a sense of what exactly we're looking at.

    One thing you might be able to do is apply a few coats of dewaxed spray shellac under the finish, could help with adhesion.

  5. Wasted4440


    Feb 3, 2015
    The glue is flush to the plane of the cutaway. The face-to-face joint of the pau ferro to maple is flat, so is the plane of the cutaway (maybe a hundredth higher at each end, which will get scraped out) and it would surprise me quite a lot if there was a pocket that formed where glue could pool when I glued them together. However, by the width of this glue line, that's almost what it looks like happened.

    I actually just received my order of platina dewaxed shellac and pumice which I plan on using to seal the wood, then apply a Tru-Oil over it. My issue with this glue is just that it seems rather unsightly to my eyes. I might just be to much of a perfectionist haha

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