hi I been playing around with 2:1 composite resource brand epoxy I picked up at Mitch’s surf shop. I noticed if I mix smaller batches of the stuff, say about 3 measuring cups worth it works great for dings on my epoxy boards. But sometimes when I mix larger batches of about half the bottle at once it gets so blistering hot that it starts to smoke and I worry may catch on fire. I mix it in paper cups and coffee cans . That can’t be normal can it? I mean how could anyone mix enough to glass an entire board? Any advice? Thanks.