The beauty of brick is that it is a maintance free building product. It is expensive and the life span of a brick house can be 100’s of years with little or no maintance. Then why paint it? Sometimes we are forced to paint a brick home. An addtion is added and matching brick cannot be found or it is too expensive to use additional brick for the addition. Sometimes after adding an addtion there is very little brick still exposed resulting in very little sense to keep the natural brick.
Lately we have seen a trend to paint brick. Like all trends this one will pass. In 10 years when the paint is peeling and the brick needs to be repainted, you will ask yourself – why did I paint this brick? Before deciding to paint brick ask yourself a few questions. Why am I painting the brick? Does it need to be painted? Is my property historical and will it effect the historical value of the house in the future? Am I OK with repainting it in 10 -20 years. If I am reselling will it be an improvement or not?
Once painted, you can only undo the paint by sand blasting. The cost will exceed the original paint job. An alternative to painting brick – dye it. https://www.dyebrick.com/product/colour-panels. This technique does not give you 1,000’s of color choices, but it does retain the maintance free quality fo brick.
Historical Brick 
Sand Blasted Brick 
Stained Brick 
Brick stain colors – www.dyebrick.com