So I been playing around in the flame forge a lot lately and I cant seem to get a stable flame to work on a upper part of the body. The head and legs are the only parts I can get to stay stable for some ready. Does anyone know why?

Also I cant get the color of a stable to be pure with a fpt. ( I mean to show the full color of the image I want) It's always off a bit. Like with a normal black flame and a fpt I can get the flame to any color I like. With the stable I can not do that. Does anyone know why?

Also does anyone have a hint on flame forging.