used hammerite paint on mine and its stood up nicely to the "fast heat" i often get ... use a soft small brush if that makes sence - not a brittle on. i used a brittle one doin the writing in red (not show in pic) and it just made life harder.
i used hammerite on my calipers, no probs at all. gotta love the stuff like!!
you couldnt use hammerite on the top of an 8v engine block..could you?