Good job so far, Skorpio.
I am also struggling with a MiG-3, from Trumpeter. After a lot of headache, my guess regarding MiG-3 interior colors is the following:
1) The steel pipe structure could be light blue or dark grey (AE-10 as per Massimo's last findings?).
2) The pressed metal frame with Dzus fitting holes and leather pads for the removable panels is light blue, see rear fuselage in Finland and many b/w pictures of dismantled aircraft.
3) The inner face of the engine removable plates is dark (outer green, AE-10 or A-14?), while their supporting frames as per point 2 always appear light.
4) I did not see any pictures of the inner side of the cockpit panels. They could be light blue for better inner brightness, as stated for the Finland relic, but they also could be AE-10, A-14 or green, if this is the color of the engine panels.
5) The rear bay behind the seat could well have been camouflage green. But what about factory-painted white MiGs? The logic suggests it is also white, for better concealing. But most of the pictures seem to show dark paint. Camouflage green does not seem logical to me, maybe "interior" grey?
6) In the relic picture here (
http://sovietwarplanes.com/board/index.php?topic=1522.0) the trim wheel appears medium grey (A-14?), while structure is dark (AE-10?)
7) Now to the seat armor plate. Here (
http://sovietwarplanes.com/board/index.php?topic=1522.0) and here (
http://sovietwarplanes.com/board/index.php?topic=1522.30) it seems to me really green. The black paint could be primer, in facts rust is only on black areas.
Seat, floor and control column seem to me unpainted aluminium, or clear varnished as no traces of other paint is visible. See above pictures of relic and also here (
http://sovietwarplanes.com/board/index.php?topic=1601.0). This does not seem illogical to me, because at least the seat and floor are subject to paint chipping.
I suppose that later examples, as white factory-painted ones, could have more standardized and "grey" interior (mainly A-14 with AE-10 steel frame?) with unpainted "wearing" parts, but these are only assumptions.
Any suggestion? Skorpio and I are eager to close the fuselage halves!