Today I tried something I hadn't tried before: thinning oil-based poly with
paint thinner to make a wipe-on poly. Somewhere I read that the first
application should be a 50/50 mix. I actually tried 60/40 poly/thinner.
When I wiped it on, a noticed a significant amount of the stain was coming
off as well. Not enough to be real noticeable, but the project has 2 types
of wood: cherry-stained pecan, and also some birds-eye maple that I wanted
unstained. Luckily, I found the problem before I ran the poly (now
cherry-colored poly) over the maple. Is it supposed to remove the stain as
well? BTW, it is oil-based stain.
Anything that is a good solvent (or vehicle) for oil-based poly will be a good
solvent for oil-based stain too. The same thing would have happened, although
to a lesser extent, had you not thinned the poly first.
Any time I apply varnish over stain, I always pour off a little varnish into a
smaller container and apply it from that container to avoid contaminating the
main supply of varnish. This actually isn't a bad practice to adopt even for
woods that are not stained -- sometimes the natural colors of the wood will
leach out in the solvent too (padauk in lacquer is a good example).
Doug Miller (alphageek at milmac dot com)
How come we choose from just two people to run for president and 50 for Miss
Doug hit the nail on the head. Hindsight, being 20/20, I would have used a
water based stain if I were planning on wiping on poly. Barry's idea of
using shellac is another good solution.
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