I'll defer to thebest1's assessment too. Something doesn't look quite right to me. I think the scratched areas may be too large?
Like, try twice as many but half as small - the viewer's eyes should recognize and register them as scratches and chips, but they shoudl not be drawn to them as a major element all over the plane (excepting Japanese planes, of course
Also I think maybe the chipped areas shoudl not have a feathered, soft edge but rather a hard edge?
Not sure, but did you use a duplicate the panel lines in a lighter color and use a 1 pixel offset to give a 3D look? I usually do that and then dial down the opacity to where it's barely noticeable.
This one will be a nice stablemate to my 112 Sqn P-51B.
