I'm looking a building my first forge. I'm sure this question has been ask a thousand times but what is the best thing to line a 10x10x14 forge with? I've been looking at duraboard, insboard , and superwool ht ceramic blanket. Will be doing some forge welding so kinda leaning to the duraboard , insboard. so I don't have to coating stuff. I think this is what some of the commercial forge makers like NC are using?