Background
Refer to rear window glass, cargo cam, headliner/rear trim, and B-pillar top cover discussions.
The inside of the rear window surround is raw fiberglass and of course needs to be covered somehow. The rubber window seal is very tight and because there is no flexible lip as there would be in a thinner sheet metal pinch weld, it is difficult to tuck material under the seal without stretching or tearing it. This probably eliminates vinyl covering since a vinyl edge that is not tucked in will eventually separate from the seam along the rubber seal and look puckered.
