Just wanted to add a comment to make sure you use dewaxed shellac. I get it as prills/buttons and store said prills in the freezer until needed. Does a good job of sealing odors in antique dresser drawers. Dewaxed shellac is compatible with every other type of finish, or so I have read. I do not have much experience with the less refined waxed version, but suspect high levels of wax could cause adhesion issues.
Alcohol will dissolve it, so keep your 'Shine away from the finished item.
