Thanks for the about Jett Basic-- I didn't know about
I'm surprised, though, by your comments about Jett Sett. You're
right about it not sticking to metal and needing bulk to hold, but
I've never had any flaking or breaking, or sludge in the bottom of
the pot, and swirling it in hot water picks up all scraps like a
charm. It cools hard and smooth and very strong. I've used it to
make pairs of dies to hammer metal between (don't have a hydraulic
press) and it has never cracked.
I wonder whether something is wrong with your batch-- could
overheating or something cause the "powdery flakes"? I've never seen
it flake at all.