RE: Propylene Oxide
Red Max sells it. Or used to. I got a gallon of it from them in the late 90s. A friend decided that he was going to drop by on a detour (he had work in DC) and pick up a 30 gallon drum of stunt fuel. I'd found some free flight 1/2-A recipes in a magazine, he contacted Red Max and they agreed to mix me up a couple gallons. Lots of nitro, some propylene oxide, and a little amyl acetate if I recall correctly. I suspect they use these things in certain fuel mixes they make. Also had him bring back a gallon of propylene oxide while he was at it.
The Jet Speed people used to use it in Dynajets - the fuel they used was pure nitro, the problem was it could be difficult to ignite, so they mixed some propylene oxide in with it. If I recall correctly, they also ran a beginner's class, where the fuel was pure propylene oxide. Different rules these days, I forget what the mandated fuel is.
Iskandar