See here Graf- Study the Masters: Claes Sundin
I don't know how to do it but keep the fuselage cross section shape in mind.
I think you want to either soften the upper highlight or move it down a bit or both and increase the lower shadow some, or have it fade toward the top some to show the deeper curve.
But do please finish it
is it me or should someone do a DB powered hurricane like Yugoslavia had, or even a Spitfire/BF109 cross breed called a Schmittfire nice work there graf, we might actually see this one finished
Yeah, now you're talking Factor in the wing fillet and smooth out the transition from the fuselage to the tail and you'll have it! And put some stippled camouflage on the sides while you're at it
GOOD WORK