Hmm. Probably a good rant. No Crew Chief in his right mind would let his bird get that messy

I think it might be that folks forget that often times guys never fired their guns in anger, and if they did, the armorors went over the guns, cleaned it up and recovered the gun ports. Not quite like us AH types who are shooting all the time

But since you asked for photos, I'll use my Spit XII stuff since they are not from a book and scan better and clearer.
Two Spit XIIs from 41 Squadron in April 1944. EB-B is the last Spit XII built and the Flight Commander's aircraft. It's been with 41 Squadron for about 5 months at this point. Still pretty clean.
EB-D behind him has been with the squadron since July 43, so about 10 months, and flown a lot more operations and has at this point 1 kill to it's credit. Paint a bit more faded and chipped, looking a bit the worse for wear.
Interestingly these two Spit XIIs were involved in the last air combat with the Spit XII in September 1944 when Terry Spencer in EB-B shot down Experten "Bully Lang" in his 190 and Pat Coleman in EB-D shot down another 190.
Note you don't see streaks from the cannons or MGs.

MB882 EB-B from the top. Looks pretty clean even after 5 months of squadron flying

MB882 from below. Oil and fuel streaks from where the DT hangs under the belly and maybe a bit of streaking from the cannon shell ejection ports as well as a bit from the mg ejection ports.
