The white paint on brick is easy to maintain because white is the easiest color to match. You can apply touch-ups whenever needed, but there is often no need. The chipping and other imperfections can add to the character of a wall and enhance its beauty.
The difference between whitewashing and white paint is a distinction that is often confusing. Whitewash is ivory hydrated lime and regular table salt mixed together to create a translucent coat of color. Although it's called whitewashing, the color doesn't have to be white and in it's traditional form isn't white when applied because the material underneath shows through. White paint, on the other hand, is usually applied in a opaque manner, completely coating any material.
While whitewashing requires less maintenance, white paint create a more neutral palette that puts the focus on the decor of the room — not the wall itself. It's the perfect backdrop for bright colors. It makes the colors pop, but it can also temper a loud interior. It's a brave and rewarding look, worth thinking about if you have brick in your home.