I've never tried fire paste so I really don't know anything about it, but what I use is something I make up in advance of a trip out. I save remnants from candles and I take some fat wood and chop it up into very small slivers then I melt the wax from the candles and put the fat wood or dried saw dust (with just a touch of charcoal lighter on it) in an old ice tray and pour the wax over it, when it's cooled I put it in an empty Pringles can and it works great. It also gets rid of all the old candle scraps I have laying around.