This is a prep question. I have a couple small creases in door panels. So I pulled them out a little and am trying to smooth and straighten the panel with bondo. It's pretty straight and smooth to the touch but even with using 400 grit paper there are scratch marks and minor pitting the size of a pin head.
Do I try to eliminate these with a lite skim coat, with spot putty or are these sanding marks something the paint will cover and fill?

It really seems that I could do this minor filling and sanding forever and still have the scratches and swirls so I wonder if this is normal and filled in with paint?