Here is the repair. In my case the lower end was completely worn through. I was able to work the putty into the crack and flatten it on the back side. While I never completed the repair (final sanding and painting) it has not broken. You can see the slight wear of the putty on the top edge. That is 2+ years of wear. This was a quick repair ( 5 minutes) to keep the dash together. So the putty is definitely an option to do a quick a repair without removing the dash.
image.jpg