Mafia_mike is right.
Since most aerosols use propane as the propellant,
(well most aerosols that work in a combustion gun anyway),
and the "active ingredient" (deodorant, paint, clear lacquer for hair ...)
is a relatively minor component (which may or may not burn),
therefore most aerosol cans are roughly equivalent to using propane.
The difference between butane, propane, MAPP etc. is really pretty minimal.
You see lots of post about one fuel being better than another but there is little actual data to back most of those up. More often than not the "reported difference" is due more to differences in the volatility of the fuel, and how well it mixes with air, than to the energy it actually contains.
The only solid data I know of is Latke's <a href="http://www.burntlatke.com/lpmapprussets.html">Propane versus MAPP</a> comparison. MAPP gave muzzle velocities about 10% higher than propane. 10% is significant but not a huge change.
When someone says something like "I have found that a mix of axe and lighter fluid is a very powerful combo" mostly what they are observing is that they have crappy fueling and mixing procedures and those procedures are "least crappy" with that particular fuel.
Not trying to rag on ya Iowaengeneer, but if you go to a meter system and mixing fan I suspect you'll find your gun performs much better, and it won't really matter what fuel you use.