(Why does it seem that almost all my questions are about how to get
rid of things? )
I’ve got a 5 gallon pail half full of investment sludge left over
from de-investing casting flasks. I set this pail out in our garage
for three months, hoping the water would evaporate, and leave me
with a bucket full of plaster I could knock loose and dump out. The
water never evaporated completely. How do I dispose of this gunk?
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