Jay
Rust Mort is a brush on rust killer which is then
neutralized with water. There are a number of Rust Converters(usually
aerosol) which leave a paintable coating . Beware that these treatments
leave a dark or black coloring over the former rusted areas.
Dave Ross has done quite a bit of rust finish
projects and maybe he will chime in
BOB FREITAS
still blue skies in MILL VALLEY ,CA USA