Home » By Alastair Miller, Lessons, Luthier » Fill Worm Holes
By Alastair Miller ·
Some of the more exotic tonewoods require a little bit of prep work before they’re fit to build an instrument out of, like this african blackwood that came complete with wormholes and sap pockets.
The first thing to do, is pick out any old dried up sap and mineral deposits with a small chisel and or pin.
Next is to fill the voids with wood dust. On this blackwood, I used some ebony dust that I had handy. Use my small chisel to scoop up the dust, and fill any spots that need it. Don’t pack it too tight or the cyanoacrylate glue (super glue) won’t be able to penetrate all the way through.
If you’ve got wormholes that go right through the piece, be sure to put masking tape on one side so you don’t glue the piece to your bench.
Next, take a toothpick and dull one end so you can hold a drop of glue on the end of it, and apply glue to the suspect areas.
…Then sit back and wait for the glue to dry. Using an accelerator to speed the drying time may cause the glue to bubble and leave voids, so use with caution or not at all.
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Once the glue has dried, you can remove any excess from the piece with a scraper. If there are any voids remaining, repeat the same steps.§
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