If It were me, I'd do somtin a little diffrent, I have seen this done only a couple of times but when done right it looks COOL. You start out with a good color that matches the interior, then you find another good color that will fade into the other color but does not have to match the interior, You spray the first color on as a base, let dry, tape off the car halfway, spray the back of the car the second color and then mix and fade in the colors so the first color blends into the second color going twards the rear of the car. The first color always works best as a dark color cause you can flame it and make the car really stand out. Just a suggestion.