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Thread: Polyurethane over Cocobolo ?

  1. #1
    Join Date
    Jan 2007
    San Francisco East Bay Area

    Polyurethane over Cocobolo ?

    I made a table top from Birdseye Maple and used Cocobolo for "breadboard" style ends. After applying Danish Oil, I wanted to add several coats of wipe on polyurethane. Before putting the polyurethane on the cocobolo, I wiped it with minerial spirits to try to reduce some of the natural oil from the wood.

    Of course the maple dried that day - no problem. But even after a couple days, the cocobolo was a bit sticky. So I wiped it with minerial spirits again. Then I used Acitone before the next application of polyurethane. This time I think it's drying a little better, but still takes a couple days.

    What am I doing wrong? I thought polyurethane would dry over cocobolo even with natural oils ?

    Thanks, Mike
    My Dad taught me that it's better to keep my mouth shut and let people think I was stupid, than open it and remove all doubt.

  2. #2
    Join Date
    Nov 2006
    Mountain Home, Arkansas
    The penturning forums deal with finishes over coco frequently. I don't believe I have ever seen a definitive discourse on the subject. Some wipe with denatured alcohol then apply finish and have no problems. Some just apply wax over the bare wood and do OK. Others complain of problems using those techniques. I have done coco pens with various finishes without any special prep and haven't had problems. Dunno Go figger
    "Folks is funny critters."

    Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire

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