It is well done, looks very tidy. Not quite sure about the 'heavy' shading on the wing panel joints though; perhaps a little lighter? Good job overall though, I couldn't manage that in what to me is a small scale!
Oops! Hadn't noticed that! I guess it's so the crew/ground crew, have more chance of seeing the prop, when the engines are running, if on top of the wing, working. Unless the black is anti-icing material? Or maybe it's just so they know whether they are coming or going........!!!