Hey,
Just for representing the German side...
I know that the Germans had an own colour scheme (brown, grey and khaki (beige?) spots) for "Beutepanzer" (captured tanks) you can find it in Osprey's 'New Vanguard - German Panzers 1914 - 18'. The signs on captured tanks were something like the "Eisernes Kreuz" (ironcross) or later the "Balkenkreuze".
But I only know about captured Mark IV or privious types.
My vesrion of the colour scheme:
Hopefully, you can see anything...
Best regards
The C-K
Automatically Appended Next Post: The tank is still
WIP...