Yes, I have checked the honey and it has been over twenty hours without drying. What method would you use to fill the gaps? I can try some of your methods again.I dont think honey will dry. It will burn. My thinking is you need something that will dry and harden. I would have used something like plaster of paris and AC powder. Honey will burn and might not be that hard. Note Im not a repair person but honey and charcoal seems inadequate.
Personally id use waterglass but there are plenty of alternatives. Homemade pipe mud is a better choice than honey for filling a gap.