Marq, you may want to try a base coat of the bottom color, then do final coats with the primary color you want. I'm painting red and I can still see dark (on the surface before I started any painting) through 8 very thin coats. I could have painted my whole car black with say 4 coats to get it all one color, then do 5-6 coats of red and I bet it would achieve what you're describing.

In fact it would probably have been a good idea to paint the car black with 4 coats just to see where the dings were, then fix them, get it totally black again, and do 5-6 coats of the primary top color.