Polyurethane Finishes on pianos

[bases-loaded@juno.com]

On Mon, 31 Dec 2001 19:32:09 -0500 "sid blum" <sid@sover.net> writes:
> I would be grateful for anyone's comments on varnish.
> 
> sb
> 

Hi Sid -

First... Happy New Year, one and all!  We all gain much from the many
contributions here.

Sid, there are so many configuations of varnish, it is impossible to
answer your query with alot of detail.  However.....

 Generally speaking, the advantages of using varnish are that it is
durable and very flattering to the wood.   It is low-tech, meaning a
brush or rag are used to apply it, and it is relatively inexpensive.  And
there are a multitude of choices readily available at any decent
hardware/paint retailer.

The disadvantages would include slow drying times, meaning it is
difficult to keep dust and debris out of the coats as they are drying, as
well as the time to complete the job is significantly increased when
compared to spray finishes.  Also, difficulties arise in application when
there is excessive humidity, so summer jobs in my climate would be risky.
 The stuff just doesn't dry well if the humidity levels are high.  

That being said, I think it is a perfectly fine choice if you feel the
advantages outweigh the disadvantages.  Personally, I think the choice of
ANY finish basically comes down to that very decision.  There are always
pros and cons.

Very good information about applying varnish can be found in
"Hand-Applied Finshes", by Jeff Jewitt, published by The Taunton Press
(the folks at Fine Woodworking).

Mark Potter
bases-loaded@juno.com