The interior of the seatbacks will never be seen again once the buoyancy foam and the seatback panels themselves are installed, so this part of the boat does not have to look pretty.
It goes against the grain somewhat to have rough and lumpy fillets and shiny resin showing drips and runs, but there really is no point whatever in creating a good finish in there.
The interior has to be strong and waterproof, of course, so several coats of clear resin were applied.
This is how the the starboard seatback now looks.
The exception here is the compartment at the stern, which will be visible via the seatback locker openings. These will be sanded to a fine finish when appropriate.