I would be worried about possible accidents with an open container of flammables, to say nothing of CO production from that lovely yellow flame.

I wouldnt use it in a car, The Flame is large and wide open, It would be like starting a camp fire on your middle console.

I used a Cotton bit of cloth and it seemed to work better then the paper towel. I use a small bent piece of steel wire as a fire poker and to coax and move the PJ. I havent tested with a large amount of fuel yet ill be sure to soon.

Just some more pictures Using Shortening And strip of cotton bandana. The Pennies I used to hold the wick up after it kept sliding down. Putting it out was as simple as hooking the wick in the middle of the solid white and dragging it slowly into the melted Shortening.

I can't see much of a hazard using a cotton wick and a low-grade fuel (fat, motor oil, the usual suspects). I doubt you could generate enough heat to crack the cheapest ceramic if you tried. The real challenge lies in managing the smoke.

Keep in mind that the oil used by the Inuit was high-grade stuff in comparison. Whale oil was the oil-from-the-sea that lit up much of Europe, back in the day.