Sam,
It depends on whether you're looking for realism or just some accent to increase the coolness. When I do a non-semiscale stunt plane, I just try to use panel lines to suggest structure. Give a sort of surrealistic view of the how the plane is built. Not at all realistic, I suppose, but enhances the overall appearance. When doing a semiscale, it's easier in a way. Just follow the 3 view.
Look over old issues of Stunt News. There are many, many examples of panel lines, but realistic and fanciful.