Before 9/11, I once carried some paint (touch up paint for a car) in a small aerosol can (think hobby shop paint cans if those are still sold) in carry on. I assumed the lower pressure in the cabin would cause a leak, and put the paint in a plastic jar and screwed the lid on tight. Sure enough, even though the jar was sealed tight, some paint did leak out of the can (but not the jar).

For checked bags, I would place any aerosols in a zip loc bag, and then inside a clear, shatter resistant jar, and hope that if the TSA does open your luggage, and leaves everything sealed.