I've heard of Gasoline...Acetone...Tolulene, Lacquer thinner, lighter fluid, etc. etc.
I've never had any problems getting my engines to start, or run, even in cold weather with just your regular, plain ordinary glow fuel. 15% Nitro Powermaster is my (pretty much ) all around std. fuel.
I hear ya on the bearings...
I think some manuf. (not to mention any names ) use "no name" bearings...no numbers stamped on them, no I.D. of any kind, and those bearings will start to rust literally over-night if you forget (get distracted ) to run your engine dry and don't use ARO