I spent a lot of time prepping my frame and applying chassis saver. It's done great except for a few hard to reach areas, rock chips and scrapes, etc. For those I agree with rustoleum ^^^^^ just clean the crappy areas and spray on, yeah you might have to touch up a couple times a year when you're in there for other work but it keeps my frame looking very nice. I also applied fluid film last winter but didn't this winter, I noticed my hitch looking a lot worse so the stuff definitely works.