Okay, I have a question for you guys.
What should I use to layer a 1" thick coating around the blowhole, to giive it shape. I was going to use bondo, but I heard that cracks when it is in thick coats, then I thought about expanding foam, but I heard that was very hard to work with.
So, I need some kind of modeling putty, or equivalent, that I can get at a hardware store.