Drywall sander - GIF

[Duke_of_URL]

Amazingly for a 60 year old house the popcorn ceilings are still in decent shape all except for one room where the condensation drain for the HVAC leaked in years gone by There is a stain there that I haven't fully managed to eradicate, but what the heck who looks at the ceiling anyway.

That's where a can of KILZ spray comes in handy. Works great and easy to apply.