Quick story. There was a big ol steel trawler
down the dock
from us. Nice old couple. Had a leak or two in the hull
. I asked about zincs. They said "what's that?" I bought them a couple of zinc fish
. A couple of month latter the lady says "What's it mean if they turn white?" But they now sadly hVe bigger problems.
Had a steel
house boat come in for a bottom job. When they scrapped the bottom it had HUNDREDS of holes. Absolutely amazing that it floated. No zincs, at least 6" of water
in the flat bilge
steel never painted, BILGE PUMP
DEFUNCT! Yet it was 20 - 30 years old. Still sitting in the yard, it needs a whole new bottom, or a crusher.