For painting smaller surfaces of walls and ceilings, we can use a flat brush with a width of approx 15 cm. The work will take a little longer, than using a bench brush, but in the absence of practice, the paint will be spread more carefully and accurately.
If we paint with a brush, generally we apply two coats of paint; less often – for high-quality painting – three. We take this order, Make sure that the brushstrokes in the last layer are always perpendicular to the wall with the window. When applying two layers, the first brush strokes are parallel, in the other, perpendicular to the wall with a window.
On the other hand, when painting the walls, the strokes in the last layer should be perpendicular to the floor. When we paint twice, then in the first layer, the strokes must be parallel, in the other, perpendicular to the floor.
When painting large surfaces of walls, a bit of trouble is the correct application of the paint and its proper distribution - this way, that there are no local thickening at the contact points of adjacent paints. You should do this here, to prevent the paint from drying out excessively in these areas. Therefore, we distribute the paint particularly carefully at the contact points of individual coatings.
To get it, the principle of wet on wet painting is used. It is about this, that we cover the wall or ceiling with another smaller paint, avoiding excessive drying of the paint in the previous place. It would be impossible to properly distribute the paint at the interface.
In practice, we can often make this task easier, working in two people. One paints the top surfaces of the wall, somewhat ahead of the second, which covers further parts of the wall with paint. With this arrangement, the paint is almost simultaneously applied to the top and bottom of the wall, therefore, it is not allowed to dry at the interface of the painting.