I got into the driver's side of the car a couple of days ago. Its rustier than the passenger side, definitely going to be a bigger challenge than the passenger side and that was a challenge for me itself. After I sanded away the bondo on the outer rocker I discovered the car had some work done on that side and none too well.
You may not be able to tell from this picture, but there's close to 1/2 an inch difference between the levels of the metal where the patch was put into the rocker, I'm surprised the body fill there never cracked and fell out as its not supposed to be more than 1/4 inch thick.
My sweety advised me to cut off the entire outer rocker as the inner rocker looked pretty bad from what you could tell inside the car and underneath the car. The front leading edge that joins the outer and inner rockers is almost completely rusted away and unfortunately I need this to locate the position of the outer rocker and get the length right. The edge for this is barely hanging in place, hopefully I can get the outer rocker formed with out disturbing it so the outer rocker matches up with the door, fender and inner fender liner. I'll probably put a bit of fiberglass on that section so that its sturdy enough to allow me to form the outer rocker without accidentally bending the front edge out of place and leading me to form the outer rocker incorrectly.
The entire inner rocker will need to be replaced and there are a number of bad spots in the lower door frame area just above the rocker. Turns out a section of that had been previously replaced as well. I'm not sure yet if I'm going to just patch those three areas of the lower door frame that are bad or going to cut out an area larger than the entire previous replacement patch on the lower door frame (most of the lower door frame). My sweety favours the latter, he always wants me to do a larger area than I want to. The day after tomorrow I'm going to start forming the outer rocker panel. I'll have to do it in two sections as the sheet metal brake I've got can do a maximum 36" width and the rocker is 70" long