Well he could scar the insignia and paint it (sigil) white edged, dark purple then the scar in blood red. kinda like Armada Wheeljack's crossed off Auto sign. That way his Nemesis Prime would have an original flair to it..... just a suggestion. then on the other shoulder he'd have the Decepticon insignia, bright and clear.
Wanted AM partner Vanguard, Myclones Dirge, G1 Victory Leo, e-hobby Dark scream ( the black version), e-hobby Magnificus
Parts- AM partner Basher-side guns, G1 Actionmaster Elite Windmill's blades[I][B]