Tony Deb wrote:
What is the best way to paint an existing popcorn ceiling? The room is
20x14. I can move everything out and I am 99% sure that it is NOT made
with asbestos.

Not sure it's the best, but I had good results spraying. Bought from a
family of heavy smokers and can't even start telling how badly ceiling
and walls were stained. Was years ago, can't remember brand or grade,
but I remember taking my time to prime twice and paint 3 times. The
prep work was a killer...