propane heat makes bare metal sweat. your paint job may look great but after some time little blisters will show up where the metat sweated
The way this is stated is BULLSH!T
Actually, a byproduct of propane combustion is water ... humidity So just like moisture forms on a cold beer on a hot day, anything "cooler" than the heated air temperature will cause moisture to form on it. ANYTHING - not just "bare metal". So heating any closed space with a propane heater that doesn't have a heat exchanger and combustion exhaust to the outside is a bad idea.
