So I just started prepping all my wood for epoxy resin. I mixed up a small batch of Raka slow curing resin and mixed in some wood flour to peanut butter consistency. I'm working in a 68 degree shop. Filled in some voids and chips and a half hour later the stuff is still soft. It claims to have a pot life of 25 minutes. I've never messed with the stuff before. Should I worry? it doesnt seem to be curing, or if it is, it's curing really slow.