Redoing my office ceiling

[Nader Hachem]

Hey BP

In my home office i has this popcorn ceiling that kept peeling and falling off so I decided to remove it and get rid of it myself. I’m also done with removing it and there’s this thin layer of paint/glue(?) left In some portions of the ceiling. How would I get rid of that? And do what would you guys recommend doing this ceiling with. Sanding and painting over, drywall and paint, etc..

Trying to post a pic but not sure if I can here..