Soundboard finishing material - what and why?

[Michael Spalding]

David,

2 coats polyurethane sealer, sanding 220, 320, and 400, and tack, after
each.  Apply decal.  2 coats polyurethane topcoat, with 400 scuff sand for
adhesion after 1st coat.  Don't thin the topcoat with mineral spirits or it
will eat the decal.  DAMHIK.

Why?  I want durable water resistant finish, as much to resist spills
(yeah, I know they shouldn't spill stuff inside, but 50 years is a long
time to expect people to behave) as to control absorption from atmospheric
humidity. 

Mike

> [Original Message]
> From: David Skolnik <davidskolnik@optonline.net>
> To: pianotech <pianotech@ptg.org>; College and University Technicians
<caut@ptg.org>
> Date: 8/3/2005 10:56:42 AM
> Subject: Soundboard finishing material - what and why?
>
> Apologies for double posting to Pianotech & CAUT.  Some subscribers are 
> exclusive to one or the other.
>
> Can someones say what they are currently using to seal / finish
soundboards 
> and what the pros & cons of this, or any other materials might be?  Is
the 
> expectation that the finish will reduce the seasonal moisture 
> exchange?  Does the nature of the particular material or the thickness of 
> application affect the board's physical / tonal function?
>
> Thanks
>
> David Skolnik
> Too hot to go out
>
>
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