Going to spray my badges (bonnet badge and 'Renault' badge on the rear) up in a nice colour

Just wanting to no what i'm best doing with them...I no they are finished in a 'chrome' type finish...but not sure whats underneath that. Obviously they will need to be rubbed down but is it chrome covered plastic or are they solid metal? Anyone done it before?

I'm pretty handy with the paint so I no all about prepping etc- just not sure exactly how best to prep as i'm unsure whats under the top layer!!!

Ta :D