What kind of paint are you using on suspension, steering, and brake parts?

I used Tractor Supply paint on my K frame and some of the suspension. I don't think it's much different then Rustoleum oil based enamel except they offer a catalyst for it. I used it on my trailer and it's held up well to that abuse so I figured why not. Typical of most oil based/alkyd enamels it's not the shiniest stuff once cured.