Rust may be the biggest problem when you are trying to preserve an old bike in original but patina'd condition. Most rust removers are acidic, and incompatible with old paint and chrome, not to mention skin. Evapo-Rust removes rust by selective chelation, without damaging surrounding paint or plating, and is non-toxic.
My first experiments were with rusty chrome plated parts- a set of Zeus Competicion chain wheel fixing bolts, and a Cinelli steel track stem. I soaked the parts in Evapo-Rust for 24 hours. As you can see, it did not miraculously restore the chrome, but it has left the surface free of rust. The black residue is carbon and will wipe or wirebrush off.
To prevent re-rusting, all you need to do is wipe the surface with Evapo-Rust after it has been rinsed off.
My next experiment is to remove the rust from the chainstay's of CTB's Holdsworth, by wrapping Evapo-Rust soaked rags around the stays, and covering them with Glad Wrap to prevent evaporation. I'll post the 'after' photos later this weekend.