It's slightly stronger and less brittle. The zinc may also lube the wire some also. He says it reduces water penetration into the rigging ad improves rigging life. It seems to me that it would make a big mess on one's deck and sails, though I would be happy to try it if it was really the way to go. Marine yacht grade wire rope is oil free.
Oil can make a modern sailboat deck hazardous.
The dribble on the deck and topsides looks bad. It's slightly stronger and less brittle. The zinc may also lube the wire some also. He says it reduces water penetration into the rigging ad improves rigging life. It seems to me that it would make a big mess on one's deck and sails, though I would be happy to try it if it was really the way to go.