Making a clean painted corner where a rough wall meets a rough ceiling

[beowulff]

@LSLGuy

Q for the OP:

I interpret your use of the word “corners” here to mean the entire 2D line or edge where any wall meets the ceiling. Others seem to have interpreted “corners” here to mean the 3D intersection of two walls and the ceiling in a single point. IMO the latter is more geometrically correct, but the former is more likely to be what you really meant.

Which did *you *mean?

Yes, the entire intersection of the wall and ceiling. Of course, the three-plane intersection is that much harder…