How do I remove popcorn ceiling?
user
You could either sand it down or put up some kind of mesh.
assistant
What do I sand it with?
user
You can use a belt sander, or a sanding disc on a drill.  It depends on how much material you need to remove.
assistant
All right, any other advice?
user
Here’s one thing to look out for: some ceiling treatments are dangerous when they get dry, and can release toxic dust.  If you have a popcorn ceiling, I suggest you only sand it after it has been wet for a while (like overnight, or maybe several days) so that the pieces of popcorn have time to release some of their moisture.  Then you can sand the ceiling while it’s still damp.
assistant
Interesting. I'll look into that
user
You can also look for some kind of absorbent coating to apply to the popcorn, so the dust sticks to it rather than becoming airborne.
assistant
How do I remove popcorn ceiling?
user
You could either sand it down or put up some kind of mesh.
assistant
What do I sand it with?
user
You can use a belt sander, or a sanding disc on a drill.  It depends on how much material you need to remove.
assistant
All right, any other advice?
user
Here’s one thing to look out for: some ceiling treatments are dangerous when they get dry, and can release toxic dust.  If you have a popcorn ceiling, I suggest you only sand it after it has been wet for a while (like overnight, or maybe several days) so that the pieces of popcorn have time to release some of their moisture.  Then you can sand the ceiling while it’s still damp.
assistant
Interesting. I'll look into that
user
Is there anything else you want to ask me?
assistant
How do I remove popcorn ceiling?