There is certainly something wrong with that picture. You'd have to really
work at it to have that happen on purpose.
You do not say whether you are using water based poly or oil based but let
us assume worst case (for grain raising) situation and you are using water
Even if you chose not to pre dampen, let dry, scuff off the fuzz, apply
finish and apply the poly, let it cure, then scuff off the fuzz the wood
should be more then sufficiently sealed to halt any further fuzz rising.
The only thing I can think of that would cause what you have happening is if
you were grossly over sanding the first coat.
Raising the grain is really a misnomer. The purpose of the exercise is to
lightly dampen the wood and it will swell. You let it dry and the cells
shrink back to their normal size. When they do severed strands of wood
remain proud of the surface giving the wood a fuzzy feel and appearance. You
then LIGHTLY sand or scrape off the fuzz. Sand or scrape too hard and guess
what, you sever more strands and you are right back where you started from.
In addition, if you sand to soon the more absorbent part of the wood, which
will swell more then the less absorbent, will be, when they shrink back to
size, lower then the harder less absorbent parts of the grain. You end up
with a distinct grain showing through your finish, think sand stone erosion
or drift wood, and you have to take the whole thing down again and start
Now, if you are putting on a coat of poly and letting it cure fully, then,
when cured, other then the fuzz left standing at that point, there is no way
for more to raise with the second coat unless you are sanding right through
that first coat.The first coat of poly would be acting as the only sealer
you would need.
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