Reply by Aj2

Real shellac doesn’t come in a can. I’ve been saying it for years the best shellac finish is multiple barely perceptible coats. 15 or more isn’t uncommon fresh shellac dries very fast esp when it’s super thin. It’s sometimes called polish but it’s really padded on. It will pop your joinery,grain and be very hard and durable. Much more then the can stuff .

These are the two I keep on hand.
I forgot to add I think your shellac was drying in the air if that drawer was sprayed. You could always wipe it down with a little alcohol denatured. Too give it some life.
Good Luck

-- Aj