tiny-umbrellas, the only thing I didn't like about the spray shellac is that it dried before it could level out very much, leaving a shallow pebble texture.
I tried for days to work that down with French polishing and finally resorted to wet-sanding to get it smooth. Next time, I'll apply all the spray shellac I'm going to do and go straight to wet-sanding. I didn't have any trouble with the shellac not sticking, or clouding up - it's really nice, and shinier than the hand-applied shellac. I wish I could have sprayed all of it, because it sure was easier.
With you being in winter, the temperatures may be cool enough that the spray might level out more before it dries. Here in Texas, we have about three days in January.
Exaggerating, but this really isn't the ideal place for spray shellac.