Thanks guys, I think I managed to come up with a solution. I measured out the resin amount that I needed onto a metal spoon and slowly heated it with a lighter. That seemed to dissolve the little clumps and it went back to being clear instead of cloudy. Then I mixed in the hardener and applied as normal. It's on the turner right now so I'll find out tomorrow if it is going to set up properly, but at this point it seems to be behaving as it should.
C_W, I'm interested in your hot box. I assume you built it yourself, what did you use for a heat source? Lightbulbs or something else?
I may play around with some other finishes like the faster setting epoxies. I would still be interested in any other suggestions people have for a finish, I'd like to have a few options in my bag of tricks.