If the surface is already covered with emulsion, clean the surface with sugar
soap and water. If the surface is uneven and worn in places, it may be advisable
to remove the paper and redecorate first. Refer to
Removing wallpaper for more details.
It may be possible to wipe the surfaces with a damp cloth
before applying the new coat. Remember to cover all furnishings and fittings
beforehand to avoid damage due to splattering. It is advisable to remove ornate
wall and ceiling lights if possible. If this proves too difficult, remove shades
and try to cover lights before painting nearby. Never cover lights which are
switched on or where bulbs are still hot.