I've had pretty good luck with the alkyd enamel Tractor supply sells on things like boat and/or utility trailers. It's fairly inexpensive, and covers well. They have it in all the standard "tractor paint" colors- - - -Ford, IH Farmall, "John Deere Green", Massey Ferguson red and gray, etc., plus a few generic colors. At one time, they even sold a compatible cyanoacrylate hardener, but I'm a little spooky about using that stuff- - - -it's a contact poison that can be absorbed through exposed skin, and it can cause nerve damage from repeated exposure.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!