A fellow in our marina epoxy-coated the Teak decks and house of his 1963 Hinckley B 40. Seems to be holding up after about 10 years. Looks fine, if you like white painted 'glass decks.
I would have thought it a very bad idea since you really could not bet on sealing the perimeter (he left his toe rails bright, so the coating stopped at the rails). If the installation included wrapping the 'glass on to the surrounding 'glass, well, maybe. You'd still have all the various penetrations to seal; they and the existing associated problems and ongoing maintenance would continue.
I've epoxy glued a lot of Teak over the years. I've had no problems. I think bonding to the old Teak with epoxy would not be a problem, either. West System concurred with the Hinckley project above. I think bonding/coating/glassing with polyester would be an eventual failure in the making.
The fact that the joints show suggest to me a pretty thin, unreinforced coating. I imagine that the sealant's solvents are weeping through the coating.
If this boat speaks to you and is cheap compared to her prettier sisters than go for her. You'd be out only the proper repair that you'd be out on another boat that needed a new deck. In other words, I don't think the removal of the coating and the Teak is any worse than the removal of the Teak.