I'd end up with broken glass everywhere. I go to the everything's a Dollar place in town. They sell an off brand zip top plastic storage bag line, in all the sizes from 1/2 sandwich to gallon. I use those for my stash of sawdust/soon to be crack filler. 

I say that about filling cracks and small blems with the sawdust, and glue mix, and sand it in, but I NEVER make any mistakes that need filling. SNORT!!!!!!  :-)