I'm working on some 109Fs and have discovered an issue with the materials file.
In the game and in the film viewer, only the prop spinner has reflections. The rest of the plane has a flat finish.

What's stanger still is that the skin appears normal in the hanger.

Not sure of the cause of the issue I moved the bitmap onto the 109G-2 to see what happens. Nothing strange here.

I opened the skin viewer to have a look at the F-4 there. All good here.

I then started to move sliders the "materials" sliders and discovered that the spinner will not change with the rest of the plane.
