Mike I wondered the same thing because a repaint is in my futre.
I looked at some of the original unrestored, unmolested cars both at Joe's and abroad. What I think that seems to be a factory Meredes treatment. The chipgaurd was sprayed on rocker and the small "lip" you speak of. My car also has that. I used to think that was incorrect. Now think that it is correct. Don't let your bodyman mud the headlight bezel mount notches. But I am sure you knew that.
It was nice meeting you at Joe's and good luck with your repaint.
Ernie
First Place AACA Show Winner 350SL July 2003
I love low mile Mercedes.
First Place AACA Show winner for 2004 280SL
1969 280 4spd Papyrus White