I've frame-savered all my bikes. It's messy, smells, and takes a lot of time. Is it worth it? Jobst Brandt would say I've wasted that time and money, and when he says something, it's usually good to listen. But then, I hung my daily commuter up on a hook before going on vacation. Normally it lives outside, uncovered. Water droplets weeped out of the vent holes on the stay, indicating water had accumulated in the BB. I pulled the BB. Guess what? Not one detectable molecule of reduced iron! And the water that weeped out was clear. I've since drilled a drain hole in the BB, but I'm also now a believer in frame-saver, or any rust preventative that can be used in a frame.