Just to update this thread, I tried the suggestion to whack it off ;-) with a screwdriver handle. No dice - guess I'm not a good whacker. ;-)
After that, I tried wet-sanding. All the grit came off the sandpaper - hey, guess I should use wet-or-dry paper, huh? DOH!
Next, I tried the suggestion to strip the paint with Easy-Off. Had a can laying around, so I thought what the hey. Sprayed it and, wrapped the NC in a bag, and let it sit for a couple of hours. Uh-huh. That worked like sh*t.
So, I ended up scraping it off with a utility knife, following up with a palm sander to get the primer that would not scrape off. The primer sands off without gooing up at all.