Addign Livery to some wings

I’ve recently tried adding my own vinyl groups to an Indy car and the Compuware Corvette wing. In the Indy car, I get artifacts on the outside wing plates and can only get rid of them if I move my vinyl to the point where I can’t see it. On the Vette, it just doesn’t show at all! I’ve resized, moved to all extremes and can’t get it to show up. I hate to say it, but the modelers got lazy and did not make the wings unique surfaces. It is on big solid or the surfaces are inverted. Also found the symmetry (coordinates) from right to left is way off on a lot of the models. Anyone know if T10 is going to fix this?