Painting tips ?

[bigdog]

Need some painting tips.....

I will be painting my metal baseboard heaters

I understand that using a spray paint versus paint brush will eliminate bristle marks, but did that in the past, with not so good results, as paint ran on the surface. Maybe it was just the way I applied ?

Anyway, I want to brush on the paint, and eliminate as many bristle strokes as I can. It's been recommended I use a foam paintbrush.
What are your thoughts?

Also would be interested in knowing type of paint to use for this application.
I'm thinking a semi-gloss enamel?

Appreciate everyone's feedback.

Thanks !