The question is, might this work for us? Is there a worry about
damaging the wing surface? Spoiling the aerodynamics? Others?

From my understanding the difference in colour or color if you live in the
USA.

Is temperature difference and this is why the markings should be at a
outboard point of the wing so as structural integrity is maintained.

http://www.mals.net/lksc05/pages/DSC00129.htm