From my understanding this looks as if it has been sprayed with lacquer mixed with a small amount of black paint, this gives it the smooth gloss finish. Obviously masking off the reverse section. There are numerous different ways to do it from film such as Lamin-X
http://www.lamin-x.com/. There are various different companies that do film like this, however it would be very difficult to cut out a section for example the reverse lights in the picture you shared. You could also spray them with tint spray although from my experience this leaves more of a hazy tinted finish. If your unsure try some fly eye, this is great to give you an idea, they are also very easy to fit and fairly cheap. You may even be happy enough with the results, however you can then take it further if you wish to and go down the spraying route.