So, when you do make sheetrock (drywall) repairs on a formerly stipled surface, how do you blend in the new 1 ft x 1 ft area to get close to the rest of the wall?
If you had gotten all the stipple off and sanded the surface on the formerly stippled ceiling it should be smooth so that normal drywall repair should look okay.
My son’s condo had stippling on the ceilings and he spent a lot of time removing it but ended up with a smooth ceiling. The problem with hopper-sprayed stippling or the twist-brush or other brush stippling is that it is damned difficult to match with a repair. You have to be really good at it. Not a layman’s job, IMO.