Don't spray it unless you have a fresh air respirator! You could lose your life.
You beat me to it Jomichael......
I would add that it brushes on well,any brushmarks soon flow out to leave a smooth glossy surface.(Just make sure you wear gloves!)
I would imagine it will also be a thicker coating than if it was sprayed.
Apache 9, I simply removed as much of the surface rust(thankfully mine wasn't too bad) used the Metal Ready,and set to it with a brush.
Shiny chassis. 
