Yeah, I'm a little scared to try acetylene or ether. I might try straight propane, but only when I build a stronger cannon. The hairspray cannon I currently have is low-pressure sch40. I need to pick up some more of the 230psi rated stuff I'm using for the air-cannon before I try anything more powerful.
BTW, I think most of us in this thread have access to actual fire-arms, so why do we still get such a kick out of messing with PVC and hairspray? I mean, is it the DIY aspect? Some inherent redneck genetic thing? Why the hell are these things so DAMN fun?:grin2: