|That bit of foam in the door is to keep it from wriggling--I need to replace a worn striker plate on this side.|
A more experienced body man could likely get away with using a nice bit of guide coat (typically a powder in a contrasting color to help identify high and low areas as you sand) and careful technique to maintain a style line, but for us amateurs, a bit of blue painter's tape will help keep us from sanding it away completely. So on went the tape. Once I'm done getting the area above the line nice and flat, I'll put tape along the top side of the line, and then sand from the bottom up.
You always find things you don't expect when working on an old car, and today was no exception. When I was sanding the top side of the driver's door, I noticed that one of the braces in the window channel had cracked. It is hard to tell in this picture, but:
Should be fairly easy to fix with a couple of quick little welds. I'm glad I noticed it now instead of after I had shiny paint on the car and was wondering why the window kept rattling.