You can certainly try, though. It's going to be dirty work, but a rubber mallet and wide scraper might make it a bit easier. Don't forget the mask and ear plugs.

really, really rather add a layer. have done so several times here.
but it is harder to get/find a contractor to repair rather than rip out.
why give up the soundproofing, insulation, and stir up all that dust. that is the part i totally object to.
and sure would not get done in 2 days.

which is why I suggested the tools.

Once you get done with chipping it off with the scraper and mallet, see how regular/irregular it is and that whatever is still on there will be there in perpetuity.

If it's not too bumpy, you can get away with installing something over it.

rather be sticky than dusty.
torch, even.

Anything less will open a can of worms.

it will serve you better in the long run and most likely you will end up doing it anyway.

the long run is not so much a concern. tho i am tackling this because i am trying to get it all done before i get too old.

this stuff has been here forever. it really hasnt caused any trouble so far.

We're freshing up our bathrooms, too. And we're fixing a lot of worms falling from the can as we go. I've hired an electrician and a plasterer to texture the walls.

Some things I used to do I now find I have no problem paying someone else to do right.

a little chinky, but mostly sound.
and a whole lot more of a pain in the ass to remove than drywall. hence.....

but affordable. My guys patching and skimming both of my bathrooms for $400. I'll paint and take down the popcorn on the ceiling.

I've done it plenty of times. Avoids all the mess and disposal of the old stuff.