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I'm sitting in a sailboat in the boiling heat of Baja. I look forward to a day when I can paint the topsides with this.

Sailboats are an interesting use case. What percentage of the deck do you think you could apply it to? Assuming you want to keep your non-skid, and a bunch of the deck space is shaded by lines and sails.

Apparently one of the problems here is that the paint has to be "very white", which I assume means that any dirt reduces the effectiveness. So that would be another challenge on the boat.

In the vid he explains that this paint needs to be covered with a plastic layer to protect it and keep it bright white.

Yes but the plastic layer also needs to be kept very transparent. I assume the vid was talking about a cheap replaceable plastic coating, although plastic itself is probably also just more washable. Still, the top of boats gets dirty and most cruisers don’t keep it boat-show clean year-round!

My boat's decks are entirely white, with non-skid molded into the gelcoat.

If there were a way to suspend this pigment in gelcoat in a way that preserved its properties, this would be killer for boats.

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