[Mainomega]

You could also do a cheaper version of this by using Tamiya's purple, red, chrome, and green.

First what I would do is mix the purple and red to obtain the color you wanted and add the chrome to give it the metallic reflective coat. Spray that starting at the front; heavy front super light end. Then mix another batch but add a few dropplets of the green and start from the end of the car with a heavy coat and lighten it up while you get to the center.

That would only give you the color change appearance in 1(2) directions but it'll still look sweet.

Just my 2 cents