I've used the stuff on my plane. Got it from Spruce but that was some time ago. Have to tell you that it sprays poorly, splattering and clogging quickly. Not recommended.
If you can download and review the product safety information, it'll tell you the amount of the zinc in the paint. That's what's important.
SEM, on the other hand, is excellent. It doesn't have any particular anti-corrosion properties except for being a barrier film.
Dave