"MSH" mnd@jaacom wrote in message ...
I disagree. The DIYer can apply another coat of poly just about as
easily as
a coat of shellac.

M Hamlin


But they can't sand the floor down without leaving lots of ruts and
hills. Shellac partially dissolves the previous coat and chemically
bonds itself. Poly relies on a mechanical key and thus must be sanded
or screened before an additional coat can be applied.