Rust Converter Recommendations. Aerosol for sun faded/surface rust car.

There are people way more knowledgeable than me here, but my $0.02. Had heavy surface rust under my brake master cylinder when I bought the car, I am sure from spilt fluid. I wire wheeled the area, sprayed a rust encapsulator, primed and painted. That had to be 6 years ago, rust has not reappeared.