I haven't tried the petroleum jelly yet, although I do have a new can stove to try it in.
Pouring that 70% alcohol into my first can basically ruined it, because now it seems to be water logged. I guess I could try the petrolium today though. I was kind of under the impression that the jelly wouldn't release enough fumes to ignite. Guess there is only one way to find out though.
Seems like with the petroleum jelly, I won't need a medium (cotton balls) to hold the propellant up close to the holes or keep it in place. I'll try it with just jelly and no cotton balls unless anyone says something different in the next few minutes here.