Ah, Rich, I see now how the star/paint is missing from the lower wing surface. As you say, it will look just as nice just re-painted - going through the means of filling the wings really isn't practical. (For those that might not know, having the wings painted silver is part of the 'factory look', since it was the standard practice by NAA to fill, sand, and paint the wings (dull silver) in an effort to increase the effectiveness of the laminar flow airfoil. The ailerons, flaps, gear doors and wing fuel tank access panels were left bare metal.)
BTW, it of course is not a NAA-factory 'detail', but I love Mustangs with Spitfire mirrors fitted!
Also, for those who might be interested and have not seen it before, here is an old video with some clips of "Upupa Epops" (including air-to-air flying) when it was, for a short time, finished in only factory markings and finish before being delivered to FHC: http://www.youtube.com/watch?v=Zl_QBwtaWWY