DO NOT put Part B in the hot water. That's where all the dangerous chemicals are, and you don't want them steaming into your environment. Part B is always so free-flowing, anyway. This tip really helps when used on Part A. And don't use wood stir sticks, which are full of pockets of air that get released into the resin, causing the very tiny microbubbles. Stir slowly, and you should be good.
Hi Miley, you're right in that the Part B contains the more dangerous part of resin kit chemicals. It's why I always recommend having good ventilation when working with epoxy. If your Part B isn't thick (like with some of our formulas), you don't need to warm it. But warming both bottles if they're thick will help release bubbles easier. I love that you're concerned with resin safety and appreciate you for sharing your insight. For anyone else who might want more resin safety tips, this article will help: www.resinobsession.com/resin-resin-resin/epoxy-resin-safety/
