Armstrong ac shroud
I get it for about $130 a gallon including the activator, but smaller quantities are more expensive, by a lot...
The folks at the paint counter have LOTS of pricing flexibility at the point of sale.
Going in person while inquiring about pricing helps to get things more affordable.
Another thing about this stuff is amazing coverage, the red on the red trailer in the above link is covered with about two gallons. It would take twice that to cover with enamel.
A quart will go a long way.
The fact that I am opinionated does not presuppose that I am wrong......