vyv_cox
Well-known member
Your last sentence is true but the scale required is mind boggling. I used to have the painting specification for Shell production platforms. From memory, it called for two primer coats, six mid coats and something like the same number of top coats. All in epoxy. Probably the same as is now on the Forth bridge.I came to the conclusion years ago that the only way to keep the keel rust free is to grit blast to Swedish standard 2.5, epoxy prime, top coat and store under cover from then on.
Realistically, blast clean, epoxy prime immediately, apply top coat and anti foul. Carry out spot treatment in subsequent years including blast treatment. Basically the same system as used on oil rigs.