Hehe, that's a heck nice idea, that's for sure. I like it a lot.
However, there's a few problems. Both doors need a better color matching to fit the rest of the car.
Both rear wheels aren't really "in touch" with the ground, it looks like they are floating. You could fix this by extending the shadow a bit, so it reaches further back.
Smoothing on bumper is a bit toony, you could have added a bit more color variaton (red tones of course) and also some ground reflections.
Lastly, the right wing mirror is showing a wrong reflection. You could have taken the other sides reflection, because it suits pretty nicely.
Keep it up!