Do you have an air compressor at home in your garage? When you get done using it do you let the air out of the tank? Why do you do that? Because compressed air has moisture in it and it will rest the bottom of the air compressor tank. I always learned it anytime something was under compression it is going to have a certain amount of moisture in it. So that is why I never used air compressed oil on my guns. So just to be safe I always use Gun oil in a can on my guns. They are too critical to take the chance.
I don't think air is the propellent in aerosol cans.
