Non-toiletry, WD-40, spray paint, spray starch, cooking spray, etc.
Aerosols, flammable that are not medicinal or toiletry articles.
Flammable aerosols that don't qualify as a medicinal or toiletry article are forbidden in carry-on and checked baggage.
Some of these products may only be flammable because of the propellant gases used in the aerosol. Look for non-aerosol versions of these products.