Hi Ken... Atleast you thought of, and asked about the temp difference, I on the other hand had been working in 67degree weather for a long time. moved to another state and tried to do a little more work, ( it was now 92degrees.) I had just mixed a cup & I started brushing and suddenly noticed the epoxy cup smoking in my hand, and the mix was like simi set jello, ( or simi set epoxy come to think of it.)
a little forethought saves a lot of sanding later.