LOL...If the 'Mad' is per usual, then the normal it tis!!
As for the KV.....(trolling for rivet counters).....Russians primed and painted there stuff with the same paint! At some point there was raw steel there. Two things happen...Steel oxidizes and tanks get built!! So I would say anything is plausible!! ;D Plus....it looks friggin cool!! 8)
MAD....MAD...MAD....MAD...MAD....MAD...