Being a pathological experimenter, I have mixed some weird things with
epoxy and even mixed it with very bad ratios. I bet your epoxy sets,
albeit slowly. You might try putting the whole thing in the oven and
warming it. I have made very similar mistakes and the ONLY time my
epoxy failed to cure was when I mixed TOO MUCH hardener.
Good luck with the MiniCups, they are fun. I built two of them. I
NEVER measure well cuz I think that if it takes that much care I dont
want to use it. Maybe all my SWAGs are right but I doubt it.
Now, what other weird thing mixed with epoxy do you want to know about,
copper dust, sevin dust, paint dust, rain, lead .................?