very cool chop
i think maybe with a tad less obvious ref's it would look more real paint wise
also try to transform the ref's a bit and lay them on lines where the body curve's , then you can alter the refs and get a super realistic look
also to get everything together a certain color filter would really pull the paint and all the rest (wheels/windows/grille) together
good stuff though

with some more practice and natural improvement you have great potential
