Epoxy paints are usually bulletproof. The premixed epoxy paints in a spray can are not as stout but will usually last longer than the plane. Do you have a specific name brand? Automotive spray paint is usually good too. Even Krylon at times. The best way to check is to spray something and then after a week rub some 15% on a rag and test. Most laquers and all enamels will NOT hold up. Strange note though, a gallon of latex works wonders......