The solution may be to either remove your shellac or add some more, thinner shellac. Bullseye is, I think, a 2lb cut. If you want to try to keep the finish, maybe try going over it with a 1lb cut or even a 1/2lb cut.
The less water in your alcohol the better. I wish I could say this will work for sure, but I haven't tried it. Hopefully someone more knowledgeable will chime in, but if not, this might be worth a try...