I decided to give the Z-poxy another shot. I mixed that up (equal parts) and was surprised to find that it was MUCH more fluid than the GreatPlanes stuff. MUCH MUCH! In fact, I could brush on the Z-poxy without dilution. The GreatPlanes epoxy resin is impossible to brush on as is (thus my question about diluting it). I've also set up two experiments: 1) chopstick #1 dipped in the Z-poxy and left to cure in my normal workshop location and 2) chopstick #2 dipped the same Z-poxy and left to cure about 1 foot from a heat lamp.

It's now 4:30pm. I'll check them both this evening.