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Thread: water based poly causing warpage

  1. #31
    Join Date
    Dec 2008
    Location
    Ouray Colorado
    Posts
    1,400
    From our early WB experience they usually come back. To me it is just easier to figure a way to coat both sides and be done with it without trying to seal with another material. There are several good ideas here on how to do it.
    Joe

  2. #32
    Join Date
    Aug 2014
    Location
    Los Angeles
    Posts
    26
    How big is the gap? Is it thickness of a paper?

  3. #33
    Join Date
    Dec 2003
    Location
    SF Bay Area, CA
    Posts
    15,332
    Pick up a can of SealCoat from one of the borgs, Scott. It is a 1 or 2# cut of dewaxed shellac made by Zinsser. Yes, it does dry very quickly so you can spray both sides within 20 minutes of each other on average. Then you can apply your WB finish and likely take your time before coating the back and you should solve the warping issue. As many folks noted, there are a few ways to address this. I like the idea of coating both sides right away...no reason to add steps if you don't need to.
    Wood: a fickle medium....

    Did you know SMC is user supported? Please help.

  4. #34
    Join Date
    Sep 2009
    Location
    Three Rivers, Central Oregon
    Posts
    2,340
    Quote Originally Posted by Chris Padilla View Post
    Pick up a can of SealCoat from one of the borgs, Scott. It is a 1 or 2# cut of dewaxed shellac made by Zinsser. Yes, it does dry very quickly so you can spray both sides within 20 minutes of each other on average. Then you can apply your WB finish and likely take your time before coating the back and you should solve the warping issue. As many folks noted, there are a few ways to address this. I like the idea of coating both sides right away...no reason to add steps if you don't need to.
    Yeah, I'm going to give the shellac a try...

    Chris, I'm in Mt. View...where are you located?
    Scott Vroom

    I started with absolutely nothing. Now, thanks to years of hard work, careful planning, and perseverance, I find I still have most of it left.

  5. #35
    BIN primer is shellac based and gives you the white undercoat. I think it sands better than the GF undercoat too and doesn't raise the grain. It seems like that would take care of both the sealing and priming without adding any steps.

  6. #36
    If these are applied drawer fronts, couldn't you just screw hook eyes into the back and hang them to be finished?

    I've used the screws/finish nails through scraps but I'd still rather hang anything I've got to finish.

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