Varnishing Soundboards

bases-loaded@juno.com bases-loaded@juno.com
Thu, 10 Jan 2002 20:34:55 -0500


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Hi David -

A couple things come to mind...

There are numerous wiping oil blends (or make one yourself) that can
incorporate wet sanding, but have a longer "open" time, giving you more
leeway on something large like a soundboard.  Surely, a soundboard
doesn't require marine-level (spar) protection anyway....  In Jeff
Jewitt's "Hand Applied Finishes" he gives an example of one part tung
oil, one part mineral spirits, and one part Waterlox transparent finish. 
You sand the wood to 320, apply a wet coat to the wood.  Wait 20 minutes,
then wet-sand the finish with 320.  Wipe off the excess.  Allow to dry at
least 24 hours, and repeat process, this time with 600 paper.  Repeat til
you get the build you want.  Sounds like it might be a more forgiving
finish for a large surface.

Also, with all the sanding going on, and if you want to use spar, why not
just brush it on like usual, and sand out the inevitable dust and rub it
out to the desired sheen?  Seems like less sanding overall and likely
less hassle.

Just a few thoughts on a rainy Thursday eve...

Mark Potter
bases-loaded@juno.com


On Mon, 7 Jan 2002 22:00:37 -0800 "David Love"
<davidlovepianos@earthlink.net> writes:
There was a very interesting article in this month's Fine Woodworking
magazine that discussed a method of using spar varnish for finishing
furniture.  It involved sanding the varnish into the wood in successive
coats using finer and finer sandpaper.  The sanding created a kind of
slurry which acts to fill the grain of the wood.  The excess varnish is
then wiped off and allowed to dry before the next finer grit is used on
the subsequent coat.
 
I have always liked using varnish on soundboards for its durability and
look, but have found it a bit of a headache because of the time it takes
to dry and the problems with dust.  This method supposedly avoids that
and creates a rather lustrous finish.  Has anyone tried this method?  Any
comments.  The article mentions that for large surfaces you may want to
use two people.  
 
David Love
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