Soundboard bleaching

[Mark Story]

I once used oxalic acid to bleach a fumed oak upright - never again!  The
sanding dust was like chemical warfare on my eyes and skin.

Mark Story, RTT
Eastern Washington University
Mail Stop 100, Cheney WA 99004
mstory@ewu.edu

----- Original Message -----
From: Michiel van Loon <mvanloon@xs4all.nl>
To: <pianotech@ptg.org>
Sent: Tuesday, April 27, 1999 10:48 PM
Subject: Re: Soundboard bleaching


> Stan,
> After shimming ,cleaning and removing the old varnish, I normally bleach
> soundboards using 30%H2O2 and Ammonia.
> I apply the H2O2 first, using a sponge and immediately after that using an
> other sponge I apply the Ammonia.
> Protect your skin, eyes and clothes.
> Let it dry and scrape of the varnish that came loose, still protecting
your
> skin.