If you are going for a photo realism, I would grab a pic of some palm trees looking upward towards the sky. warp the image into the windsheild and lower the opacity. Done. I like to throw exagerated white gradation reflections as well. The wheel rotation blur looks good but the front intercooler should be darker and more recessed in the front fascia.
If you want to get real detailed, I would change that old chrome wheel reflection on the road to a softer green reflection from the new matte black and painted wheel. It wont cast the same reflection. I'm assuming you were shooting for a matte finish? there would be no reason to mess with the base image reflections in the paint.