Hi Misos,
very good! The only thing that I don't understand is the meaning of the phrase "modified NKAP scheme" - what is modified there? It looks standard to me... what would be in your opinion, more standard scheme? consider that NKAP instruction included poorly printed, post stamp size, simplified sketch...
It's about the basic question: were there standards or not? Pilawskii and many others say that there were no standards (NKAP supposedly issued "recommendations" only, planes were painted with whatever was available, etc.). I am one of those who believe that there were standards, orders, that planes were painted with aviation paints only etc. So, I see that word "modified" as indication that the plane wasn't painted according to the NKAP directive.
BTW, plural of aircraft is aircraft - not aircrafts (no "s" at the end)...
KL