Just trying out a gumpaste shoe and would like to know how long they take to dry....
I always make my gumpaste models a week ahead. So it has lot of time to dry properly.
I try and make all my GP stuff as far ahead as possible.
I've done mine in a day in a pinch. Put a toothpick in the heel and it will be ready to use almost immediately. Dry it in front of a fan or, my personal favorite, a food dehydrator.
I've done mine as close as the day ahead as long as it isn't a solid block of gumpaste that needs to dry. My trick for a quick dry is to put the item in a small room (my spare bedroom) and put a dehumidifier in it and leave it on overnight. You can feel how dry the room is when you enter it the next morning and the item is normaly rock hard.