Thanks for the responses. I've looked at Boeshield's products and don't know which one to get specifically for the inner frame. Do I get the one intended for bicycle use? It comes as a squeeze bottle, rather as an aerosol spray. Should it matter? I'm also looking at their "Rust Free" product line for cleaning the rust off the exterior... Has anyone used this (or any rust-free coating) to treat the inside of their folder frames?

Someone also suggested that I use any motor fogging oil because it's basically the same ingredients as the Frame Saver. Has anyone done this? I want to do it right the first time.. thanks guys!