Thanks guys.
I increased the opacity of the red trim a couple of points, and bumped up my rivet shadow and glare lines, in both the diffuse and spec files. This gives the metal skin a little bit of a 'quilted' look, especially when looking at glare from an angle.
I also tried the rivet specularity trick I used on my last bare P-47 skin, where the rivets are light colored but I make them dark in the spec file. This essentially makes them change color from light to dark as sun glare plays across the skin of the plane and keeps them somewhat more visible even through the glare. Its an interesting, if subtle visual dynamic.