On Mon, 22 Sep 2008 17:12:20 -0700 (PDT), Chris
wrote:

Hello.. I am priming newly patched/repaired plaster walls with PVA
primer. The walls were never painted before- covered w/wallpaper. I
accidently rubbed up an area in a tight spot and a smudge occured.. I
tried to fix it, but it is peeling now. and, off comes big shards of
it off the bare plaster patch. when it fully dries, will I be ok to
sand the edges and reprime the area?


Should work. After a light sanding you may need to skim coat the area
with a wide plaster knife. Check using a trouble light (and your
head) held against the wall to see the defects.