What’s the best way of getting the rust off a shotgun?

RUSTY SHOTGUN
Mike George
It may just brush off, with a brass or bronze brush ? but do make sure the brush really is brass or bronze.

A ?brass? brush I bought from a DIY outlet recently turned out to be brass-plated steel.

Fortunately, I discovered this fact before I did any damage with it.

The trick is to test with a magnet.

Alternatively, a soak in a very mild acid usually does the trick ? vinegar, a citric acid solution, or even Coca Cola ? followed by mild brushing.

The longer you spend on surface preparation and de-greasing before re-blacking, the better the result will be.