I've used a paint called 'Metal Cast' to paint my calipers, it requires 2 types of paint: a primer coat and then the colour itself. I had VHT paint on before but it looked crap, though it wasn't the same as the stuff paulr33 has used (it was a matt finish, not shiny). I've never seen that shiny VHT stuff before, is it a new paint?
Here are some (not so good) pics of my calipers. I've still got to do the Nissan logo: