Start with the existing finish
Testing the texture avoids promising a scraping method before paint and adhesion are known.
Painted texture changes the decision
After removal, repairs are feathered into the surrounding surface. Broad differences may be better addressed with skim coating.
Read more about painted popcorn ceiling removal and why the surface should be tested before a method is promised.
Repairing the exposed ceiling
Directional light is useful during inspection because it can reveal edges that are difficult to see under flat work lighting.
The finishing scope may include ceiling repair, skim coating, sanding, primer and paint. Not every ceiling needs every stage.
A test section can change the method
If the first method starts damaging drywall, the approach changes. Repair is then matched to the exposed substrate.
What affects the estimate?
Area is one factor, but it does not describe the whole job. Height, access, number of rooms, furniture protection, coating, substrate damage and the finish required all contribute to the scope.
The popcorn ceiling pricing guide explains why two ceilings with similar dimensions can require very different preparation.