http://www.woodweb.com/knowledge_bas...d_shellac.html
is a forum thread on shellac and wax/dewaxed comments. Might be
helpful to visit.

On Tue, 20 Jun 2006 19:58:52 -0600, "mywebaccts (at) PLUGcomcast.net"
"mywebaccts (at) PLUGcomcast.net" wrote:

Okay, I know that shellac doesn't actually come "waxed". It has the wax
in it and you either get it in its standard form (or waxed), or you get
it "de-waxed".

I've read plenty on the virtues of de-waxing shellac. For example, if
you want to use it as a primer or conditioner, dewaxed is better.

But ... what are the advantages of leaving it in its waxed state? I
assume that there must be some advantage, or otherwise why would they
even sell it in that form?

Jack