Magnific ships Potchip 
great!
As i promise i consulted the two articles about ww2 planes painting, i'll try to do a summary:
for the army aircrafts;
All inner structures in traslucent blue primer , the nearest fs (federal standard naturally) is the 35109. rarely in panel gray 36373
Wells in traslucent blue primer like inner structures or in Light Gray 36622
IP choices are between Light Earth 30266, Dark Brown 30111, black 37038, Panel Gray 36373.
Seats in Dark Gray 36118
Propeller ogives can be in 30111 dark brown, 30061 red brown, 37038 black, and rarely in silver (37178).
Naturally some exception is possible like spirals etc.
Propellers;
---from 1936 to 1942 , front of blades in Silver 37178 and tips in Dark Brown 30111, the rear in Dark Brown 30111.
---from 1942 to 1944, front and rear in Silver 37178 or Dark Brown 30111 with one or two ittle stripes in Deep Yellow 33538
---from 1944 to the end of war , front and rear in Dark Green 34092 or Dark Brown 30111 or Black 37038 ; tips in Deep Yellow 33538.
ASAP the marine finished the time 