Now and then I decide to empty my ladling pot to try a new alloy. In the past I have generally driven a large screw into the cooled slug and levered it out. This time I decided to get ahead of the curve with a pot full of Lyman #2 that I knew I would not want to ladle again anytime soon, so I plunged a bolt into the cooling pot...head down. Not my finest hour. It seems that Lyman #2 is indeed fairly tough once it has had a week to harden. I ended up cutting it off the bolt with a brick chisel and a 4# hammer. Next time I'm putting the threads in and leaving the head out where I can get a socket wrench on it.