Once again another awesome work, I wish people commented more
Really good work using that base image and turning it into something awesome.
A few things I noticed:
-You have added alot of noise into the paint but not on the windows, but becasue the background is very smooth you didnt need to add noise
Click:
http://imageshack.com/a/img743/94/17d6c6.jpg
-1 the wheel arch was badly cut, you need to make sure everything is perfectly round
-2 The bottom of the side skirt and front bumper is too bright, have a play with the Burn tool to make the bottom darker so it blends in
-3 The far side of the front bumper is too short, you need to extend it a bit to match
-4 For a bit of extra atmosphere, because there is a nice light source in the back of the background, add a bit of glare to the roof/ hatch cover to add to the scenery.
All up a very nice chop, keep up the good work Sandmann!