I have some Hock blonde shellac flakes that have been sitting around for a couple of years that I decided to use. They had solidified into a big chunk. I beat them with a hammer and reground them with an old coffee grinder. I mixed some up for a 1# cut and have had them sitting overnight in a jar with DNA, which I shake everytime I walk by. They don't seem to be dissolving very well. Can they go bad? Suggestions?
Thanks,
Larry