After reading the replies, I haven't seen one addressing your problem. I, too, am happy that both the heating element and PID still function. If it were my pot, I'd heat it up and drain as much -- hopefully ALL -- alloy out of it. After cooling, I'd put a stainless steel brush in my Dremel -- kind of like those used for cleaning primer pockets -- to get every molecule of melt out, and finally using same brush with some Iso alcohol. I'd then put something -- anything to snugly fit the drain hole to keep epoxy from getting into it -- followed by my generous mix of J-B weld. At the "worst", I reckon you'd be better than before. But, as long as the area you're to put the epoxy on is 101% grease free, and you have ensured you're not getting it in the hole you need -- by gum & golly -- it might be worth a try!
Good luck!
geo