How long can I store shellac flakes in an air tight container before they go bad?—Sal Morgani

Garrett Hack replies: Shellac doesn’t go bad so much as it becomes harder to dissolve and dries more slowly. I have used high quality flakes 4 or 5 years old, and crude seedlac many years older than that. I double wrap mine in plastic and keep it in really tight cans. Mix some up, and if it dissolves, use it.

Finishing