Stik: that's one of the pics that led me to believe the uber-weathered A6M2 portrayed in the very neat Japanese movie "Eternal Zero" (you can see bits of it on YouTube - I bought the disc online and was very impressed with its CGI and real faux Zeros: bit sentimental like a lot of Japanese films but a huge hit in Japan and worth a watch by any WWII aircraft fan.) Nick Millman of Japan Aircraft claims the M2 was built by Nakajima until 1944. He also claims most photos show only moderate wear - it's possible modelers overdo weathering on IJ planes, but photos like yours are not hard to find. There certainly would have been a lot of new or low use planes around - any plane that saw serious service had a very short lifespan. But, as in so many other fields, I think history certainly allows extreme weathering as a valid choice - it also allows a freshly arrived plane ready for its first mission.
I haven't checked Doog's site lately, but he's a splendid modeller. I liked it when he was on this list, but I can understand why he went solo. He's upped the ante on scale - 1/32 fighters, even a 1/16 tank. Might make sense for a hard core modeller like him (who probably has a good place for a big display case) but I'm perfectly satisfied with 1/48 for WWII fighters and 1/32 for WWI. But there's much to learn on his site. Actually if you look at some of the photos of planes flown by pilots like Ike Kepford (Jolly Rogers I think) who flew off the coral strip at Munda Point Doog could have weathered the craft even more. Coral dust, I was told by pilots who flew there, was like sandpaper and no friend to tidy aircraft.
Eric