In this composition, following Mr Frety’s advice, I added the radial specular to separate the car from the background. And it works!
But! I did this in post which is not what I intended.
I will do it in 3D next. Hee hee!
I switched to the mental ray car paint shader instead of the layered shader. It really works better too!
Added falloff the the light and reflection planes and the reflection looks like what I wanted to achieve already! Yay!