---------------------- multipart/alternative attachment 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: <A HREF="mailto:bases-loaded@juno.com">bases-loaded@juno.com</A> > Reply-to: <A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> > To: <A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> > 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 > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/29/2e/f8/07/attachment.htm ---------------------- multipart/alternative attachment--
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