CWD,
The little I know is....
Coastal Command used the "Temparate Sea Scheme" (also used by Fleet Air Arm) which was Extra Dark Sea Grey/Dark Slate Grey/Sky, until around mid 1942. (I wonder if anybody has exact dates??)
After trials, it was found that white fuselage and lower surfaces worked very well for large maritime recon aircraft (Sunderland, Cat, Liberator, Fortress, Halifax, etc.)
The "plan area" (upper surface of wings, fuselage, tailplane) on these machines was left in the EDS Grey/DS Grey camo.
Sorry, can't be of more help.![]()
Cheers
Kosmos.