Could you post process/ pix of dash rebuild ?
Your plum CV looks about like my blue one when I found it! I don't see any major damage, other than the sunburn. My spar varnish isn't as nice as a good gel coat, but for a 44 year old boat, it's not half bad! I've entered it in several ACBS shows, where it gets a lot of compliments!
My ABS dash was a mess. ABS plastic does very poorly when exposed to so much sunshine. I'm surprised they chose that chemistry for the dash. The right end was missing, so I made a mold from the left end and made a new right end. Two of the gauges fell right thru the holes, so I had to make new cups for them. A yogurt cup made a good mold for the center gas gauge. Drill a drainage hole at the bottom of each instrument recess. The glove box door had a big hole where the original handle mounted.
I had some kevlar cloth from a previous project, but f'glass would work just fine for reinforcing the interior surface of the dash. Scuff the entire interior surface with 100 g. sandpaper. Use strips of f'glass cloth to fit the contours, and bond with 20 minute EPOXY (not polyester) resin. The 20 min. cure time gives you time to get thing adjusted. You'll need to apply some tape to the outside of the dash to pull cracked areas together. Do a small section at a time, with time to cure that area before you move to the next area. I used a piece of Formica to create a new face for my dash to rebuild the broken glove box door. I found a friendly cabinet maker who had lots of interesting scrap pieces of Formica that were looking for a new application!
We're on our maiden voyage here, after the restoration, at the
genuine London Bridge, Lake Havasu AZ.