I spend a lot of time on the phone from fall to winter due to our warnings on keeping the temperature proper but one thing that shocks people is I will say
If you get metal temp up and booth up to temp and spray cold epoxy, you should just not do it, period...
The hot plate shown is worth its weight in gold.
Think about this, heat in the shop overnight is 55 degs; if you measure inside epoxy temp, it will be in the 50-degree range.
In just a few mins you can raise the epoxy to 80 85 degrees in the can, just stir every 5 mins, and epoxy holds eat great.
Yesterday we made red and gray epoxy; before going to the filling station, I get the batch to 100 to 110 degs for faster filling; an hour after done the can still be around 80 degs