Bullseye Shellac is pre-mixed. Which means it has a shelf life. In a few cases I've heard of the shelf life expiring before it was sold. I don't use shellac at present, been a long time since I have. If I wanted to use a bit, I'd have no problems with buying a amll can of Bullseye. But if I were going to use shellac on a regular basis I'd buy flakes, on-line, and prepare it myself.
Right now, for my banks, my usual finish is a coat or three of thinned Titebond II. That seems to be working well. I'm not sure where I ame up with using that, but checked with the Franklin 1-800 # and asked how they thought it would work out. They seem to think it will work, at least they told me that they know of wood carvers who coat outdoor pieces with several coats of Titebone, and apparently no problems. Check back with me in a hundred years or so.
Oh yeah, I don't notice any tint with 2-3 coats of the thinned Titebond, but if you keep putting coats on it will eventually take on a yellowish or amber hue. Unthinned Titebond will get the hue much faster.