One of sticking the masking tape all over the place, that is. 🙂
I usually don’t bother with masking tape except for the light switches and sockets when painting walls, because I am very good at handling my brushes, thankyouverymuch, but with a brand new wallpaper and a gleaming new ceiling and especially coving, I decided to put it all around the ceiling/coving and the walls where it touches the wallpaper. I didn’t bother with the skirting boards and the architraves, because those have to be freshly painted anyway.
Stick, stick away!