Fuming is a suface phenomena. It will sand off. Not a big deal, fume
again, unless you find a particularly satisfying 1/2 way effect and
decide not to. If you want it very dark, it's easy (put it in and forget
it) if you are trying for a lighter color you need more care to yank it
at the right time.
On 11 Oct 2004 13:29:57 -0700, firstname.lastname@example.org (Jeff Bennett)
It darkens to a varying depth according to grain direction, fuming
duration, and the general fickleness of timber. If the surface is
already fairly smooth, then you should be OK. If not, then just give
it a bit more fuming afterwards.
I've taken nearly 1/4" off end grain and still been in the darkened
wood. I've also taken one light swipe with a plane over quarter-sawn
and left dark heartwood and pale rays behind.
It is what you do when you make a mistake.
Or maybe this,
You may be OK. I did just fine sanding some floor boards in a staircase
landing. I was just leveling the joints between T&G boards( fumed for 2-3
days). I came up a little short and needed to add a 1/4" filler strip. I
gave the filler strip just a couple of hours in a big with ammonia until
the color looked right. It did not fare as well. I had to build a little
in-place ammonia tent to fix that.
I did see a more scientific test on somebody's website that showed cross
sections of fumed wood. The penetration varied but was as much as 1/4" in
some cross sections.
With a few days of fuming found that the penetration of a solid 1/8". more
on the end-grain.
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