It appears that new pilots flew what was issued. It appears the Germans didn't waste paint until there was reason to believe it wouldn't wind up on fire for awhile.

And apparently each paint job that got onto an airplane was basically unique. That is to say, there could be some story behind that "upside down" paint job. Like whose it was.

And it is logical to assume that with the life expectancy of the front line pilots, the problem of individual airplanes gaining too much weight from repeated painting was NOT a problem.

And all that aside, it is definitely strange looking.