in theory this could actually be possible depending on how adding new markings works. of course, the markings would be listed alongside the body markings, but id assume if you make markings using the wings uv, add the marking into the .cfg and apply it to the wing mesh, then it could work
possibly
idk exactly how it works but seeing as markings are separated into head/body/tail i'd assume the files name which mesh is used, you could just reroute it to the wings mesh
-shrug-