When metal rusts, you'll find loose iron ... Pro tip: Power tools might be too aggressive for removing rust from small, delicate objects or thin steel plating. In that case, consider electrolysis.
You first have to break the bond formed by the rust before adding lubricant to ease out the metal screws. Bearing this in mind, professionals often turn to these three incremental techniques for ...
Result No rust. Calcium chloride dries out the air ... This process deposits a thin layer of metal on the object being protected. An iron object becomes coated in atoms of a less reactive metal.
So that's how I go -- all the way down. You don't have to sand down to bare metal, just enough to remove any peeling paint or rust. If you didn't do this, any loose paint will eventually flake off ...