I have replaced all the skin fittings. A number have been sealed permanently with fibreglass and epoxy and others have been created.
These are Blakes bronze seacocks which can be shut off:
2 no. Toilet (heads) inlet and outlet
1 no. Kitchen (galley) sink drain
1 no. Shower and heads basin drainage sump outlet
1 no. Bilge pump
1 no engine cooling inlet.
Lastly the ship’s log sensor fits in a plastic through-hull.
Each fitting has a plywood backing pad bonded and sealed to the inside of the hull. Four bolts secure the fitting with lots of sealant.