ORIGINAL: RCPAUL
I hope your not mixing the epoxy in a waxed paper cup or on waxed paper. The wax will keep epoxy from curing.
Paul
i never have problems using wax paper to mix epoxy even in the heat we have here at times. always cures in the time its supposed to.
i have had some old epoxy not cure in the amount of time it was supposed to. you could probably run a heat gun over it but if its old you just have to wait.