With the "ceilings by room" highlighted, the rightmost icon.
When selecting a "floor" swatch I get taken to the ceiling view where i can paint by room. If I then select the delete/hammer tool the view switches to the default room view, and I cannot select the ceiling. Clicking on the floor deletes the whole floor.
How are you doing it?
You could try using the TS3 style camera, it has more flexibility for viewing. To be honest I haven't played with ceiling paint in a while as I don't use it that often, but last time I used it, it was possible to delete them. Google says that in order to revert to original colour you need to delete the ceiling and then rebuild it. If that is not an option, you could try finding a similar enough swatch you could use. If you are using the TS4 camera, you don't often see the ceiling anyway, reason why I don't bother with them much myself.
