Comments about Pettit Z-Spar Pettit Protect High Build Epoxy Priming System:
It works very well if applied following the directions of the manufacture. I used it on the stern board of my old Zociac, to provide a water barrier. I know it would be good as a primer for under water metal parts. I mixed some of the primer with a putty knife. It dried on the knife and I had the devil of a time trying to get it off!