really nice work here mate and brilliant attempt at the brushing
what i would say is that you need to add some white highlights to the front windscreen,
perhaps something like this:
As for the lip and sideskirt, they just need a little more shadow on the lower edges, to give some added depth, try finding a picture of a real car and try to mimic the reflections/shadows found on lips and sideskirts there
Other than that it is a great chop

really good work, so keep it up
