Hi!
I see you brushed the whole body, I must say, brushing realistic looking reflections and color are very hard to do, especially for someone who haven't been choping long. Easiest way to get real looking reflections (and colour) is to copy them from another car. And by overbrushing just some parts is a great way to practice and learn brushing. I recommend you to check out the tutorial section here - http://www.autemo.com/forums/?f=22 (though some links may be dead in there )