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Good feedback Ralph. One thing I would recommend is to remove the paint from the glue surfaces on the lower wing half.
Also the fuselage interior behind the oxygen bottles should be of NMF as memo serves.
I usually don't worry about mismatches too much as I weather with various shades anyway. Adds to the "used" look but, of course, if you want a pristine finish then it's important. That said, where such touch-ups are needed, I've usually masked up to the hard edge and resprayed the area, making sure to feather the edges in case the colours differ slightly. Of course this is much easier in larger scales.