Got rust? Take it from me, sometimes, heck a LOT of times 'just a little' rust can suddenly turn into a lot of rust once the body man gets in there and starts looking around. This is known as the "minefield" phenomina. Any time you bring a car in for some rust repair make sure you mentally and perhaps financially prepare yourself for a potentially extensive body job. My $200 "fender dent" quickly turned into a $2000 "rebuild". Happens all the time.
Good luck and I hope she comes out looking great. -LY