There is so much information and products offered to treat surface rust or a panel with rust Pitts . I replace the panel if available but its not practical always , . All of the rattle can spray rust converters do not work IMO.
The area will rust again right under primer and B/C coat and a couple years later , there it is again .
Can anyone recommend a process ?
Ex: 1951 Ford F100 Roof
The roof is pretty solid but has lots of tiny pits after sand blasting and grinding to bare metal .

Thank you for your help