The 5, 10, 30 minute stuff is not for me. The only epoxy I use for bow work now is Smooth On ea40. If they quit making it, I'll look for another. I haven't seen a need to size any of the woods I've used with it. They don't absorb it like they do Titebond. I work it onto the wood in both directions to ensure there are no dry spots and assemble. I let my shop get cool in the winter, so I've warmed it if it felt a bit thick, warm the wood sometimes too if needed, but like someone else said, you don't want to get it too warm, it can really accelerate the curing time.