Not much of a comment but a little tip:
The white paint over Eastern front aircraft are water soluable stuff that washes away with some heavy scrubbing.
The feel and look of this paintjob, though as subtle it may be, is definately different from just a common "white paintjob". In other words, there's some kind of difference between planes that's been painted white, and planes that have been painted over in white.
There are some methods to depict this feel, and I'll bet everybody uses different ones - but at any rate, some type of method is used, to give the different feel.
One simple, indirect method, is making the plane really dirty.
The white overcoat generally washed and peeled away easily, so they didn't polish or clean up planes that became dirty. If some parts really became dirty, they'd just wash the surface and repaint it again above. The end result was, the Eastern front aircraft, when looked up close, looked something like a car that had been left out in the rain for months. Dusty, dirty, muddy colors and uneven white blotches.
Adding that effect would give out some clear perspective that this aircraft is not initially painted white, but rather coated in white for certain seasons only.
