motavated - those pins to attach the latches to the frame were made of the same plastic that was used for the latches. They were notorious for snapping, leaving half of the pin in the frame.
The point of them was to allow you to unattach the latches and slide the glass out of the frame. We did this a few times on our vehicles and the pinstripe seems to be actually baked into the glass, I think when the glass was tempered, so we never had an issue with scraping it off.
Of course, we always felt a bit worried about sliding it out, the glass will shatter into tiny chunks. We never broke one but always felt that was a big risk. The glass is quite tight as it is centered in the frame clips but as you slide it out, about 1/3 of the way, you are clear of the center frame clips and the window is free.
Be gentle.