Is there a recommendation of the number of coats for a ship submerged in seawater and what is the effect of saltwater on Rust Bullet?

A minimum 12 – 15 mil dft (dry film thickness) is recommended for Marine applications. Additional coats or mils may be needed for adequate protection dependent upon substrate and exposures. Sea temperatures vary as does the salt content; these factors may also help determine the appropriate dft. Salt water should have minimal effect on Rust Bullet. Refer to ASTM B117 Seawater Spray (Fog) Test Results and ASTM D870 Seawater Immersion Resistance Test Results for further technical and engineering data on salt water exposures.