yes, in the WW2's duty Queen Mary (like Queen Elizabeth, and Aquitania, and..)
was painted in Grey (i think in march 1940), the original skin (the autor of the ship is UBOAT234) is correct! This repaint is "just for fun".. :p
This cunard livery was used for Queen Mary before the war, and after, until today

because QM is survived..
and i think she will stay with us for a long time in the future
ps With sh3Commander it's possible to have the ship in cunard colors from 1939 to march 1940 an in "Grey Ghost" from march 1940 to the end; isn't it?