[Thomas An.]

How can it be shiny and dirty at the same time ?

[zent]]

This render is amazing!! It may be a little two shiny in the back, but thats my only crit. Excellent work.

[Micha]

Nice done.

The camera focus looks like set at the background, maybe you could focus at the car and enable a little bit DOF blur at the background.
From a photographer view I would give more space between the image edge and the car front.

Is the background a HDRI environment? Looks great.

And the image looks a little bit to dark here.

[Pere Balsach]

Thank you guys!

Nice point Micha about to have more space in the front of the image! Thanks for the tip
Yes, the background is a custom made HDRI, thanks man!

Thomas An., well, yes...maybe is too shiny on the top part, but most dirty cars are quite reflective in the top part isn't it?
Anyways, I was looking for a nice image, and IMHO the reflective part looks nice

[Xlars]

This is simply top class in my book .. wow