Nice work gap. Very few ships are painted all grey. But something is interesting : it seems that buff superstructures are part of the camouflage system. Indeed, look at the tanker British Genius : original funnel colors are not buff. Maybe it was because grey paint was in short supply, and they used buff paint to do the rest... Another fun fact : the hull has a camo pattern.
Else, the Ellerman's Hall Line seems to have decided to repaint all funnels in orange...
