Whats the best fuel for a combustion gun?
The best fuel is arguably the fuel that is the most accurately metered. For this reason, metered MAPP or propane would be the “best fuel”. For aerosols, it would be a combination of which one was easiest to get the right amount of fuel into the launcher with, and which one burned the cleanest. Right Guard deodorant used to be the fuel of choice, but now it has moved on to other things. For larger chambers, I use starting fluid, although it is very picky.
