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

I used a variety of spray can paints to get colors I wanted. Mostly Rustoleum, which is holding up better than some of the others. Been about 4 years and I have some rust spots on areas that were mostly 'other' brands. Rust on - Engine which is Mopar paint with VHT primer, strut rods that were done in some other brand 'cast' paint...
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