RAAF never got Wellingtons - or generally any British aircraft prior to late 1943 due to the demands of the European air war on British aircraft production.
If I recall my correctly, we mainly used Hudsons (militarised Lockheed Super Electras) and Wirraways (a twin-seat trainer completely unsuitable for overwater patrol) until the locally produced Beaufort and the imported Liberator became available.
Edit: I stand corrected - three squadrons’ worth of Spitfire Mk Vs were delivered in late 1942. Which was still paltry compared to the requirement, but was probably welcomed by veterans of the war in North Africa along with the Kittyhawks we were receiving during a similar period…
The color (colour? ) looks like a zinc-chromate primer or similar finish in order to protect the aluminium/duralumin. Typically varies from yellow to green, and can be more brownish-yellow if additional anti-corrosion treatments are applied after the fact or during operational service (which might be the case if operating in the south pacific). I didn’t see anything in the picture that screamed “bad AI retouch”, it looks pretty much like many WWII era bombers/transports I’ve been inside.
Ah that’s interesting and it may well be the case - I’ve only ever seen the “yellowish-green” and “bright green”, but then again I have a very small sample size of actual aircraft I’ve seem (all of which have been subject to modern restoration and protection)
When I was searching for a Pitts to buy in 2013, I found one that looked quite like that. The seller was a former F14 RIO and painted his in a BA livery (very weathered at the time that I saw it). But like the one in the photo, it had the Ultimate wings and tail and an MT prop. He had nosed it over and destroyed the prop. He didn’t tear down or properly inspect the engine so my mechanic advised me against it. The one pictured here is way too “busy” IMO.
fancy 
) looks like a zinc-chromate primer or similar finish in order to protect the aluminium/duralumin. Typically varies from yellow to green, and can be more brownish-yellow if additional anti-corrosion treatments are applied after the fact or during operational service (which might be the case if operating in the south pacific). I didn’t see anything in the picture that screamed “bad AI retouch”, it looks pretty much like many WWII era bombers/transports I’ve been inside.
