Remember to start the can moving before pressing the trigger and to release the trigger before stopping. Thus, if you are going back and forth, you stop and start spraying at the end of each stroke. If you hold the trigger down all the time, you will load up paint at the end / start of each stroke.
http://www.rustoleum.com/product-catalog/consumer-brands/professional/high-performance-enamel-spray
This is holding up well in my RV-7, easy to use, cheap, available at most hardware stores..looks nice.. I used the Light and Dark Machine Gray.
Some may not know that the exact match for Van's light gray powder coating is available in a rattle can.
Tractor Supply has a Ford Tractor Industrial Gray that matches Van's Powder Coating.