In the Coast Guard we called zinc chromate "green death". The drill was
Chip, Paint, and Soogey. Chip off the old paint until you got down to bare
metal (using a chipping hammer), paint it (zinc chromate, red lead, and lastly
color), and soogey (keep it clean by scrubbing with a stiff brush and washing
the dirt and soap into the sea. One of the primary tasks of anyone with a
Seaman's rank and even a few 3rd class Petty Officer's from time to time.