I dont know the rule on waiting after toasting,,
I think work on your other bow a few days or week and then go back to the toasted one,,
I live in high desert,, I have sprayed mine with water after toasting to speed up re hydration,, but dont know if that is a good idea,,,,I just thought it might help,, didnt seem to hurt anything,,
if you put rawhide on it after toasting,, it will be ready when the hide is dry,,