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+-- Thread: Oops! (/showthread.php?tid=7332665)
Oops! - Halfathumb - 08-21-2017
I mixed up & used Van Dykes crystals, pretty good so far. I got impatient and applied H2O poly before it totally dried. Now it's time to bring out the sand paper and start over.
Any suggestions are also appreciated.
Thanks
Jim
RE: Oops! - Snipe Hunter - 08-21-2017
Make sure you have enough sandpaper?
RE: Oops! - fredhargis - 08-21-2017
I don't think whether it was totally dry would have mattered. When you apply a waterborne finish on top of a water soluble dye/stain/coloring agent the finish will redissolve the colorant and cause it to streak (that's what happened???) and do unwanted things. You could have sprayed the top coat and not had problems, but otherwise you need to seal the dye with shellac or such to provide a barrier layer between it and the top coat.
RE: Oops! - Halfathumb - 08-21-2017
(08-21-2017, 10:11 AM)fredhargis Wrote: I don't think whether it was totally dry would have mattered. When you apply a waterborne finish on top of a water soluble dye/stain/coloring agent the finish will redissolve the colorant and cause it to streak (that's what happened???) and do unwanted things. You could have sprayed the top coat and not had problems, but otherwise you need to seal the dye with shellac or such to provide a barrier layer between it and the top coat.
Didn't streak much, just caused it to ripple. If you seal it with shellac, why would you need a top coat? I always thought shellac was a top coat. Would an oil base poly work?
RE: Oops! - fredhargis - 08-21-2017
Shellac is an excellent top coat for some purposes but it's not as durable as, well, pretty much anything else. If it's suitable for your application there's no reason you can't leave it as the top coat. Top coating it with anything that's not water soluble (including oil based varnish) would probably work just as well. But your definition of "just caused it to ripple" has me wondering if there was something else at play here.
RE: Oops! - Halfathumb - 08-21-2017
(08-21-2017, 01:46 PM)fredhargis Wrote: Shellac is an excellent top coat for some purposes but it's not as durable as, well, pretty much anything else. If it's suitable for your application there's no reason you can't leave it as the top coat. Top coating it with anything that's not water soluble (including oil based varnish) would probably work just as well. But your definition of "just caused it to ripple" has me wondering if there was something else at play here.
For a lack of a better word, "ripple". I mean it appears to be dissolving to stain and rising up looking like an accordion.