How Should I Paint Interior Brick?

Q: How should I paint interior brick?
A: First step is to scrub the surface clean using a firm synthetic-bristle brush and a TSP (trisodium phosphate) solution. Rinse off the TSP thoroughly so it doesn’t interfere with the paint’s adhesion. After the surface dries, patch any damaged brick joints with repair mortar and a small tuck-point trowel. Tool the joints smooth and allow them to dry completely. After masking off the surrounding area with plastic and painter’s tape, apply a coat of latex primer that is specifically formulated for use with brick. Roll on the primer using a 1-inch roller nap. After it dries, roll on your color of choice in semigloss or gloss latex paint. Cracks and divets can be touched up with a small detail brush.