Not exactly, but youíre close.
The idea behind galvanizing anything steel is to protect it from rust. Thatís the purpose of galvanize. Part of how this prevents rust it that the galvanize coating (zinc) does oxidize slightly, but in doing so it forms a protective water-tight surface. No water -- no rust.
Everyone knows that if you just let the snares hang in the air for a while, they coating will turn gray of itís own natural accord. Boiling the snares in a mild
basic solution, like a mild solution of baking soda, just hastens the natural process.
By the same token, as I described in a post above, too strong of a basic solution with actually attack the galvanize and eat it away. You should never boil snares in something like a lye solution.
Acids are another matter all together. They react more quickly with zinc than do bases. A very easy way to remove galvanize coating from chain and other things you might want to rust is to dip them into muratic acid. (Outdoors only!!!) The zinc will be gone in a matter of a few seconds, and your steel will be rusty tomorrow.
Vinegar is a very weak acid, thatís the reason most folks donít get themselves in too much trouble using it. But personally, I would never recommend that anyone dunk or soak their snares in vinegar. Baking soda is cheap, and it doesnít cost all that much to boil some water.
As for the cable being rougher, thatís certainly a valid observation. But Iím not sure thatís a significant impact on the performance of the device. Look above where Buzzard said he didnít even care if the locks were rusty.