As usual, a wealth of information! Well, I've got a tin full of jeans ready to lob on a fire, or on a stove when I get a break from my university work, and I'll get my hands on some cheap linen. Will charcloth from jeans be fine in the meantime?
I've used denim in a pinch but it doesn't work as well as this.
[video=youtube;pmTssR5csdg]http://www.youtube.com/watch?feature=player_detailpag e&v=pmTssR5csdg[/video]