I am working in a 90+ degree garage now and have seen the pot life drop significantly. I am using the same epoxy. What I have done is move my jugs of epoxy and hardner into the air conditioned house (@ 74). I put them into and aluminum turkey pan to catch drips. The decreased temperature has given me enough time to get the epoxy completely mixed and on to the project. I mix it in the house. Starting with 90 degree epoxy was just too fast for me.

Jay