Okay... I had to get the model to see it myself... I used SimLab CADVRter Free Trial I got the OBJ file & the MTL file and this is how it's supposed to look. The dark streaks are the windshield material cutting thru the cockpit shell/frame or the space between. Make the material called "Planetary" invisible. If you download the collada version you'll get the three JPEG files inside you're missing... the textures he covered the ship in... these textures are not reflections but they're made to give that impression.

I set the winshield to be transparent somewhat... and I removed the texture he was using it so now it's plain white and transparent no reflection... the image you see thru it is the cockpit frame, he textured that too the same as the windshield... so if you remove the windshield you have a shell underneath... whatever that is.

So underneath the windshield there's another material