I drank some beer around a big one like that last winter. It was awesome. Never seen one before that. One of my friends called and said to come drink some beer with everyone, just bring a few gallons of used motor oil, without further explanation. I said....ok....sure & just laughed. When I arrived, there in the driveway stood a big smudge pot like that one.
That is interesting they were used to produce smoke screens, did not know that. But from playing around with that one at my buddies, it seems like it would be difficult to maintain heavy smoke output as they usually either want to burn hot and clean, or just kinda go out.
As far as liquid fueled heat output, I have found that I really enjoy "radiant" style kerosene heaters. The quite inexpensive Sengoku HeatMate model HWN-110 or CTN-110 has been excellent for the past 4 winters as occasional indoor (yes indoor....I have a couple Co monitors) for supplemental heat. I installed a milesstair wick (see below link) and it's been even more efficient/clean and easier to use.
If you are curious about kerosene heat or lamps that use wicks, either radiant or convection, check out
http://www.milesstair.com/
Great website for safety, parts, wicks, ect.
I don't like the "convection" style as much just because you have to heat all the air to really warm up. The below pic is the model I have and is considered a "radiant" type. Burns extremely clean as the red hot metal acts like a catalytic converter. Never seen my Co monitors register even 1ppm when running indoors.