"Bing" Bong's ship, "Marge" has been depicted with both Black and OD anti-glare shields...
Judging from these photos (and others that I don't feel like posting because I think y'all get the idea), I'd say black was the best bet for the anti-glare shields...
What is noticeable is the change in kill marks from the top photo vs. the bottom... In the top one, the red part of the kill mark is painted directly onto the metal from a stencil, while the bottom ones appear to be decals..
Another thing to consider is which P-38 he's flying... When the NMF was standardized, aircraft that were already painted OD had the OD paint left on for the shields, and also came from the factory that way until the factories used up the stocks of OD paint and switched to black... I don't know how many "Marge"s there were since I can't find any photos that show the data plaque well enough to check the S/N, but it's conceivable that there was more than one "Marge"... After all, Tommy McGuire flew at least 5 "Pudgy"s...