I had a similar discovery awhile back; I was getting to the end of the resin, which had crystallized. I heated it on a halogen light to use it. I soon found that it mixes easier, spreads easier, and wets out easier. With MAS slow, it does not seem to affect the pot life either.

> Dear List I would like to share some thing that I wish I had discovered
> earlier I finished a second stripper in summer with high humidity and got
> a very disapointing milky effect on the second coat which got worse the
> more I tried to fix it.This I now know to be due to moisture trapped in
> the resin.The cure I found is to heat the resin with a heat gun as you
> apply the second coat.It works and the resin also flows like water .I hope
> this helps someone from avoiding this irratating side effect. Thanks Phill