really at this point who has popcorn that hasn't been painted?Popcorn is easily scraped off after wetting it. Use a pump sprayer, wait 5 minutes, and it all comes down with a single scrap from a large sheetrock knife. I did a 750 sqft room in 1hr.
Now, if it's been painted...that's another story.
it's been up there since the 80's probably.