Gary said that using Teflon tape on the threads (like others have suggested) will help make removal easier. He said our nut end was rusty too. The rod will get replaced before the rust becomes an issue, other than the threads getting rusty and, again, the tape helps somewhat. Ours showed some pitting and corrosion at the nut end, so it will be fine for another season at least.
Deb & Gary
2007 Ford E150 cargo van, 2012 Rockwood Premier A126
Everybody needs beauty as well as bread, places to play in and pray in, where Nature may heal and cheer and give strength to body and soul alike._ John Muir