I haven't used the new chrome paints, but the way I've seen it described is:

shoot the area black, with a catalyzed paint.

Then you have to sand and buff it to get a very perfect surface.

The "chrome" paint is dusted lightly over that, then it is clearcoated with a special clear that won't cause the chrome to turn grainy like silver metallic.

A lot of work for a small area, in my opinion.

Another option is to have a local sign painter, or airbrush artist paint it to look like chrome. This starts with a white base, and has reflections of the sky and earth painted over it. Most painters throw in a few sparkles, too.