Lavochkin La-7 / Academy, M 1:48

The original and appropriate lacquers for VVS aircraft cockpit finishing can be summarized as follows:

AII Blue (preferred) and A-14 for Polikarpov fighters
IMP (preferred) and Wood Finishes for early LaGGs and La-5s
IMP or ALG-5 for later LaGGs and La-5s
ALG-5 for the La-5FN and La-7
IMP for early Il-2s
IMP or ALG-5 for later Il-2s
unpainted (preferred) or IMP for the MiG
IMP or ALG-5 for Pe-2s
IMP for early Yak-1s
IMP or ALG-5 for later Yak-1bs
IMP or Wood Finishes for Yak-7
IMP or Wood Finishes for early Yak-9
IMP or ALG-5 for later Yak-9s
ALG-5 for Yak-3
etc...

As you can see, a lot of blue-green colouration. The variation is that these aircraft's cockpits were completed,
from partially up to fully, UNpainted depending upon the factory, time, and situation.
A uniform cockpit colour was the exception, not the rule.

Code:

http://vvs.hobbyvista.com/Research/colour-samples.php