David Starr wrote:


Shellac's chemistry isn't tough enough for bathroom use. It dissolves
in alcohol so spilled aftershave will leave a mark, and it isn't very
water resistant.

Fresh dewaxed (emphasis) is very moisture resistant. It's one of the
reasons it's used to coat medicinal pill and confections. Shellac that
contains wax or has esterified becomes less resistance to moisture.

--
Jack Novak
Buffalo, NY - USA