Remove as much furniture as possible from the room to be painted. Lay the plastic sheeting on the floor. Cover any remaining furniture with the plastic to protect it from paint splatters.
Set up the stepladder in a corner of the room so that it can be used when needed.
Pour two to three inches of indoor wall primer into the paint pan. Cover the walls with a thin layer of the primer. Use the paint roller for larger sections and the brushes to reach into the areas that the roller cannot fit into, including the edges of the 3D elements.
Rinse out the paint pan, and clean the roller and brushes. Allow the primer to dry thoroughly for 12 to 14 hours.
Repeat steps three and four, only with the wall paint instead of the primer. Allow the first coat to dry for 12 hours before adding any additional coats.