Ramzey,
Looking through all my Mustang stuff, in particular close up images of camoflaged Mustang IIIs, I don't see any specific stenciling on the aircraft.
That includes images of S/L Eugeniuz Horbaczewski's Mustang III FB166 PK-G of 315 Squadron PAF, which I would assume is the Mustang you are working on

Image is a closeup of Horbaczewski's Mustang III. I don't see anything below the cockpit etc outside of the kill/mission markings.
Dan/Slack
