Sean, attached is an image I scanned from The Great Book of WWII Airplanes, Illustrations by noted illustrator Riku Watanabi..As you can see there is heavy weathering on the bottom center part of the fuse. This image resembles a photograph of a spitfire taken from the ground as it was flying overhead. Hope it helps..

Evan, you will like the testors enamels.. I would prefer to use Model Master Acrylics myself but the enamels get really hard after they dry..The good thing about the acrylics is that they use water for the thinner and clean up.. and you get the same type of finish (just about) as you do with the enamels....

Regards BobH.