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Protect the carpet with 3" masking tape. Run the tape about 1/2" onto the face of the baseboard and push it down under the base with a wallpaper smoothing tool. (Putty knives will cut the tape when you're forcing it down.) Lay dropcloths over the floor and on top of the tape. Remove all switch-plate covers, put tape over the outlets and switches and remove all wall-mounted grates. Also cover any hardware, such as doorstops and hinges, and remove knobs and door strike plates.