Umm, should be about the same approach I reckon. I suppose you could make a big batch o' char cloth by stuffing a piece of cotton clothing in a dutch oven and doing it like I would my charcoal. When I am swabbing down my dutch ovens during a seasoning session, I use cotton patches from towels and tee shirts, and they will smoke up enough that they will easily catch fire later on. They get loaded up with burnt oil/grease and turn almost black themselves. I never thought to save any of them for firemaking, but maybe I ought to give them a real test. Might've just stumbled onto something here. I can give this a spin this weekend on my bbq and let y'all know how it goes.