This is an example of wire brushed rusty metal sprayed with Rust-Oleum and left out in the weather for a year. I usually repaint these every year here at home.
It's a hanging basket hanger that I make and sell. the paint might hold up better in a more protected environment though.
I've never been big on snake oil remedies for much of anything preferring to do it right as Mongocanfly suggested but we all know that that isn't always in the cards and we have to clean, wire brush and put on a coating that hopefully works.
Por 15 started out as a rust converter coating outfit from the get go.
https://por15.com/
Eastwood has a batch of rust related coatings. They usually tend to jack someone else's formula when it comes to this kind of stuff though.
https://www.eastwood.com/paints/rust-solutions.html
You can get Rust-Oleum rust converter at ACE and then paint over it with their oil base paint.
https://www.acehardware.com/departme...removers/13650