A friend of mine has a bowl by Harry Nohr. Harry pioneered turning here in our area during the 60's and developed an epoxy finish using his kitchen oven in the process. She recently told me it had a crack in it and wondered if it would continue or not. I really don't know what to say. I suspect it's not a good thing. What would you tell her? In truth, this is the first case I've heard of one of his bowls cracking.