it looks like whoever made the model has coppied two bits te texture one part.
You will have to adapt the design rather than change the texturing.
For example, i tried as hard as i could on my corsair but to no avail. I had to stick with this ::):

as you can see, the markings on the underside of the wings can only go so far.
btw, its available for download in the vintage section of the site