I've seen some pretty hacked up jobs.... It's not too bad. One thing that makes it look kinda fake is the front tire.... you can tell its slightly out of place. The blur around the picture could have been done a little more neatly (IE in some places it is on the car). If you're aiming for the car to be the center of attention I do suggest that you keep the background "less" interesting than the intended object. Just keep practicing.