Around here, you can dispose of shellac in the regular trash after you allow it to dry. I have about a half quart can of Zinsser Seal Coat that's at least 10 years old that I'm trying to get rid of.
First I tried just opening the can and letting it sit for a few days - no sign of drying out. Then I put it out in the sun for a few days- still liquid and no major change in level.
I've tried applying some liberally to some cardboard. I'm sure that will eventually use up the can but it is pretty slow.
Any other ideas how I can just get this to dry out so I can toss the can?
Thanks, Mark