How is this different from a regular marine wax?

It is a hybrid ceramic sealant rather than a paste wax. It goes on as a spray-and-wipe, leaves a ceramic-style barrier and is meant to last longer and bead water better than a conventional wax, though it gives less of a deep hand-waxed glow.

Can I use it on a car or truck?

Yes. It is safe on paint, metal, vinyl and glass, and on gloss wraps and paint protection film. It was formulated with boats and RVs in mind, but the chemistry works on automotive surfaces too.

Will it work over an existing ceramic coating or PPF?

Yes. Meguiar's says it is safe on ceramic coatings, gloss wraps and paint protection films, so it works as a topper or maintenance layer over them.

Spray it on, spread it with a microfiber applicator or towel, then buff off the residue. Work in small sections and avoid applying in direct sun or on hot panels.

How often should I reapply?

There is no fixed interval; it depends on sun, salt water and washing. Reapply when water stops beading tightly or the surface feels rough, which on a boat or RV is typically a few times a season.