I've finally gone down to the local airport and purchased some jet fuel (aviation grade kerosene) for the purpose of fire spinning. I figured that I would relay my experiences to anyone else that wants to give it a go. First there is the issue of whether aviation grade kero is actually safer than other fuel. The stuff that I got was manufactured by Chevron. The MSDS can be found
here. Unfortunately, the MSDS is pretty vague about how much naptha and benzene are in the fuel so it's hard to assess whether it is any safer than "ultra pure" lamp oil. I feel that one can safely say that jet fuel is probably the highest grade kero that one can buy and is generally cheaper at about $2 a gallon than anything else available.
To get the fuel, I used
airnav to find an airport nearby that offers self service Jet-A. I drove down there in the middle of the night intentionally to avoid any traffic. Though I doubt anyone would particularly mind if someone is walking around on the tarmac, it can make pilots nervous. I pulled up to the pumps and to my chagrin discovered that the Jet-A pump uses a 3" wide oblong nozzle for which I had to fabricate a funnel to get fuel into my fuel can. I used the credit card terminal to pay for the fuel and also used a fictitious tail number when it asked for one. I'd avoid using a real tail number off a nearby airplane as this information is kept for the purpose of accident investigation. Note that the Jet-A pump is designed to fill up tanks that take hundreds of gallons, so it does begin to pump very quickly after the initial few seconds.
Jet fuel burns very much like any other kerosene, except that it's possibly smokier and stinkier than most. It burns just as brightly and just as long as one would expect. I've read an assertion that the ingredients used in kero to prevent it from being so stinky are toxic, thus jet fuel should be both stinkier and less toxic than other fuels based on petroleum distillates. For the purposes of comparison, I'd really like to see a copy of the MSDS for ultra pure lamp oil. I'll probably continue to use it, as I now have several gallons and it is quite cheap.