Aotake is the name of the anti-corrosion paint you need.
Tamiya, on the release of their magnificent 1/32 Zero produced a paint to cover this colour.... X-13 metallic blue.
of all the different paint makers I have tried this is the best as it closely matches the blue samples.
If you look at my recent ZM Shinden build you can see that I have used this paint as a nod to the usage around the engine.
Aotake is very much a difficult colour to nail down as each batch made was hand measured for the materials used and hand mixed, so each batch had a different hue from blue to green.
to further muddy the waters over colour and shade is the fact that this paint further changed colour with a chemical reaction to light and salt air.
the product was also more or less the same consistency that Tamiya paint is and was always applied by paint brush and not sprayed.
So, get the X-13, and slap it on with a normal brush. Don't thin it down.
Do a test first onto a white plastic spoon and do a very watered down clear green to see what effect that has with NATURAL light refraction.
All other vendors of Aotake colour(s) seem to forget the metallic sheen this paint has. Tamiya not so!
when it comes to Japanese aircraft I always go with Vallejo for the paint job as their paints and sets are the most accurate, the exception is their Aotake and I always use the Tamiya stuff for that with a paint brush. In fact, I think it is the only Tamiya paint I have!