Hey AirZoom, if the rust inside your doors has gone so far as to rot all the way through, the only GOOD way to repair it would be to rebuild that section with sheet metal and have the door jams repainted. If it is just surface rust, go nuts on it with a DA sander after removing the pin switches and repaint that area. I would suggest doing quite a few coats of paint and clear coat to keep it from doing this again, oh and make sure to get rid of all the rust, or it will just rot from the inside out. My car will be going through this next year, as the body around the pin switches is starting to rust. I need to get rid of it before it rots all the way through.
Josh