Andrea,
I also just came into this question for my Jug... lots of excellent information on the AirCorps web site. Here is a quick snap shot
from the 1945 structural repair docs regarding exposed aluminum and what the factory recommended for field repairs...
I am using the yellow zinc chromate on mine just like in your picture of the FHC P-47.
Hope this helps,
John
Last edited by john534; 11-01-2017 at 07:25 PM.
Reason: pic mods