I am curious to know what is the filler inside cartomizers made of? Isn't it called poly-fill? It has directional fibers, and if it works inside cartomizers, it should work with atomizers as well.
Cartomizers have always had cotton in them. I think your thinking of the old cartriges. Those used poly fill that was basically aquarium filters that you could get at pet smart. It's made of plastic. It just held the eliquid, it was never used as a wick. There used to be a stainless steel mesh in a bridge in between the poly fill and a silica wick. It was used in the same manner as its used in the GP spheroid. Please don't try to use that stuff as a wick..