So what you are seeing here is the unfinished transom job from the inside. The white part is where the sun damaged the un-gelcoated glass after the boat had to be put outside. Some grinding would have to be done to get rid of sun-damaged glass. Alot of small repairs will probably have to be ground out completely and re-done. All repairs had been done with Raka epoxy.
This was a post shows how it was going before the health problems and being forced to move (which forced me to put the boat outside at my Dad's place).
http://www.classicseacraft.com/commu...ad.php?t=25098
It was an inside transom job. The old core was vacuumed out and everything was ground down to clean glass. A plywood template was made and then solid Coosa Bluewater 26 was cut with edge angles to match the hull angle exactly. The notch was raised from 20 inches to 25 inches for a 25" shaft engine to reduce the chance of sinking. The outer skin was in extremely bad shape so several layers of heavy triaxial and biaxial went in to resupport the outer skin before the new core went in. Thickened cabosil was put on the coosa and outer transom before putting in the new core. Multiple more layers of biaxial with mat and heavy triaxial without mat went on the other side as well.
Anyway, the plan was to regrind the surface for better bite and then come back and add more layers of heavy fabric tying further into the hull sides because the original corners of the boat were in such bad shape that I would not trust it if I did not add more glass tying further into the boat. The goal was at the same time, to rebuild the stringers so that they had a chemical bond with those final layers on the transom. Knees were cut out of Coosa and radiused with a router, and then I was going to pour in expansion foam (still have it somewhere) but this part never happened because of what happened with work and my health. This pic is what it looks like after 2 years of sitting outside.