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Early Mitsubishi built A6M2 Zeroes were painted in an Olive Grey colour with a lighter 'Grey' variation on the fabric surfaces.
The XF-76 represents a slightly faded version of the original Olive grey colour, your zero most likely would not have faded to any real degree yet, so it would still have been the stronger Olive grey colour, glossy in appearance, which does not show up in many Zero images.
What paints will you be using?
Many thanks Wayne for your answer.
I have thought to two options for painting: either the above mentioned XF-76 or the Gunze H70 that seems to be a bit darker, may be adjusted to the gray for fabric surfaces; but if you have any suggestion on different paints (acrylic) I will be happy to consider them.
Alberto