The thing that most impressed me with the two pack marine paints was when I used it in our shower at home. When we bought the house the shower tray was one of the then quite new composite materials, but poorly installed, as it as unsupported, with a void underneath. It cracked not long after we moved in. I repaired the crack with epoxy, filled the void with foam, then tried fibreglass resin, flow-coat, even Brightside, as finish coats, and they all cracked and peeled quite quickly. In desperation I sanded it back, then put on 3 coats of International (Interlux in Nth Am) Perfection two-pack, and do you know - that surface was so good we couldn't kill it. In the end just last year we had the whole bathroom gutted and replaced everything, but right up till when it was ripped out, the Parfection two pack paint was still holding up - and I might add we had long since abandoned the practice of wiping it dry after showers. Something I thought we should do initially, to try and lengthen its life. I have since had the boat hull done in the same paint, and it looks fantastic. Post-manufacture Gelcoat is just no match.