SovereignHobbies - wow, I'm well off then! I'd always thought of 507A as being a dark shade,and 507B as the medium grey. If they were in fact essentially identical, that changes a few things, and raises a few questions from me!
That is indeed the camo scheme I was referring to - do we know what colours were used in it? I had read 507C and 507A, but if A and B were identical, and A/B was used as Home Fleet Grey (or was it??), then the dark parts of the scheme clearly cannot be 507A, since they are very clearly darker, as seen here (March 1941, being over-painted immediately after returning from the US). You can see patches of the first coat of Home Fleet Grey remaining below the freshly painted areas (though not much!)
I appreciate that this was an unofficial camo scheme, and so the exact colours may simply not be documented anywhere. I believe the photos you posted, of KGV in drydock at Rosyth after being received into the navy, was when the scheme was first overpainted (the coat that subsequently peeled off so badly).
Turret roofs were clearly painted dark (grey?) though - this is also March 1941:
Interestingly, the wooden deck does not look particularly dark here. How certain are we that it was painted/stained at this time? These ships were so wet forwards that they were often soaked and of course appear dark due to that...
The decks were painted with dark grey non-slip paint.
