Made a livery for the F7 and found some issues: The first being that the old design is still visible under the layers I put on top of it. Second the undercarriage can not have layers or be painted. Provided screen to demonstrate the issues.
Almost no 3D models permit painting below the frame. One or two allow the cow-catchers, but that's it.
I never really noticed that before. Maybe it's just the colour of it that makes it stand out so much here.