Tom, It's going to be difficult to form that line if you don't have the original shape to go by, but it can be done. If your driver's fender is OK there, you can make some templates and transfer them to the passenger side. Not impossible. Those marks you see are references for where the bolt holes attaching the fender to the running board go, and to locate the bottom of the patch. Once you get that done, you'll be an expert with hammer and dolly.
