[hellosailor]

Green should just be verdigris, a surface reaction to oxygen and moisture. If the metal under it was pinkish, instead of brassy yellow, that would be galvanic corrosion.

Searoosters (take that, fascist juvenile web censor!) are of course never "grounded" unless you wire them to a helix or rod in the ground. (And I'll bet "rod" gets past the censors!)

Bonding them all is a discussion similar to debating whether Ganesh or Thor is the more venerated among the Gods.