I'm toying with the idea of using liquid fuel as the power source on a propane-style[1] forge. (just 'cos I can - no real need for it).
three options so far I've seen: a paraffin (kerosene) powered weed burner/flame gun (popular in UK in
50s/60s) I've also been looking at a petrol (gasoline) blowlamp or waste oil burners which work by preheating the oil.
comments, or links?
[1] by which I mean an insulated cylinder with a side fed burner using a separate fuel supply, not a "traditional" coal or charcoal forge with separate air supply.