A bit late, I know, but agree with Scott.  One suggestion I will pass on
from previous discussions on the porch.  When you are going to use older
shellac. first lay a bit on glass.  If it dries as it normally would,
you're good to go.  Probably what has happened is the alcohol in your mixed
shellac has absorbed water from the air and messed up the drying ability.
A few years ago, I bought and used alcohol that was 98% anhydrous (moisture
free).  A couple of folks thought I was a bit anal in using it,  I still
use shellac I mixed back then with perfect results.  I also mix and store
my shellac in pint or quart canning jars.  I think doing that also helps
retard water contamination.
FWIW.
Bruce Z.
Des Moines, IA

On Sun, Aug 19, 2018 at 9:32 AM, scott grandstaff 
wrote: