I was welding aluminum with a 2% ceriated tungsten. You guys responded and told me to try a pure green one. Man what a difference! It balls more smoothly and buries itself under the cup neatly and stays there for many welds and I can weld my butt off with it. New stuff with new smells. I almost know what I'm doing. I think. I guess I'm just starting over again....If I can just keep it out of the puddle, and the filler away from it....