Traveling light on plaster walls: This is a great tool and tip for helping to find those small holes and plaster dents and defects prior to applying the final paint top coats.
Place the flood light adjacent to the wall and facing lengthways, so the traveling light reaches the length of the wall. Walk along the wall and fill affected areas with finishing plaster. Move onto the next wall.
When dry give a light sand a quick undercoat with a brush and apply the final paint coats.