shellac under varnish

[Avery Todd]

Well, I know it's wrong but do you think you'll still be
around in 50 - 75 years? :-) I won't!

Sorry, but I couldn't resist!

Avery

At 02:36 PM 08/29/03 -0700, you wrote:
>Yeah! But what about 50 years from now? 75?
>      Thump
>
>--- David Love <davidlovepianos@earthlink.net> wrote:
> > I've always used shellac under varnish and never had
> > a problem.  I like it
> > for a variety of reasons not the least of which it
> > provides a nice surface
> > for rub-on soundboard decals.  I use flake dewaxed
> > blond shellac and mix it
> > myself.  The canned stuff on the shelf is often
> > pretty old by the time you
> > buy it and it only has a life of 3 years.  The main
> > reason I brought it up
> > was that every time I open a can of varnish I can't
> > help but see on the
> > label where it says "Do not use over shellac".  Well
> > I've ignored it for
> > this long, but I thought I'd ask just in case there
> > was something there.
> >
> > David Love
> > davidlovepianos@earthlink.net
> >
> >
> > ----- Original Message -----
> > From:
> > To: pianotech@ptg.org
> > Sent: 8/28/2003 9:27:10 PM
> > Subject: Re: shellac under varnish
> >
> >
> > In a message dated 8/28/2003 2:00:10 PM Pacific
> > Daylight Time,
> > bases-loaded@juno.com writes:
> >
> >
> > Subj: Re: shellac under varnish
> > Date: 8/28/2003 2:00:10 PM Pacific Daylight Time
> > From: bases-loaded@juno.com
> > Reply-to: pianotech@ptg.org
> > To: pianotech@ptg.org
> > Sent from the Internet
> >   David
> >    I have typically used shellac for a sealer coat
> > on new boards on the top
> > and bottom before the ribs and bridges get glued on.
> > I like the sealing
> > properties and it keeps  dirt, glue & water from
> > glue cleanup from
> > impregnating the panel during ribbing. I always sand
> > and then coat with
> > nitro cell. products. No problems here as to
> > adhesions. I use one good wet
> > coat of the bullseye in a can, ooooohh I can hear
> > the cringing from hear. I
> > spray it on. I quit using varnish over shellac after
> > I lost several finish
> > jobs to the crinkles& varnish is tooo slow to cure
> > for my schedule. What
> > can I say I'm varnish impaired. Love the smell
> > though.
> >
> >
> >               Dale
> >
> >
> >
> > Hi David -
> >
> > Shellac is actually an excellent choice for a sealer
> > coat under
> > "traditional" varnishes, but under the more modern
> > Polyurethane
> > varnishes, which seem to comprise the majority of
> > the product lines these
> > days, only dewaxed shellac will allow for proper
> > adhesion between the
> > shellac and poly.  Polyurethane is very persnickety
> > about what it adheres
> > to, to the point where it really doesn't even adhere
> > to itself that well
> > unless proper techniques are employed.  And
> > certainly, the natural wax
> > content found in conventional shellac products would
> > prevent the poly
> > from achieving good adhesion.  That's my take on it,
> > anyway....  With
> > dewaxed shellac, you are safe with any finish I can
> > think of.
> >
> > Mark Potter
> > bases-loaded@juno.com
> >
> >
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