I have an interior concrete wall that has been painted with what seems
to be swimming pool paint - turquoise and tough as all get out.
Unfortunately, the painter didn't patch the imperfections in the
concrete surface before he painted. I'm guessing the dents are air
bubbles from the original pouring 40 years ago.

My understanding is that typical patching compounds (like Top 'n Bond)
only stick to raw concrete. Any suggestions on how to patch the
divots?

Thanks,
Chris