I'll try that sometime in future when I dig up some more cash.
And yeah, it's definitely an exothermic reaction, as you can feel the stuff get hot.
I did a batch today where I thinned it with a touch of acetone(like probalby .5 oz for 6oz of resin, and even that was a bit more than I coulda gotten away with), it seemed to thin it out well, yet still set up hard. Waiting itll tomorrow before I cut it up and try grinding it, but it seemed to ahve thinned well enough, will still hardening up, and also seems to have saturated the fabric better.
Thanks for all the information on this thread.