Bekah,
I woulld consult with a professional painting company for more information., however in my experience when encountering brick chimneys which have been painted, I have seen cases where moisture was trapped behind the paint causing the brick to deteriorate and flake off. Again, a painting company may be able to recommend a specific paint that will be appropriate for this application. Hope this helps!
Eric Consuegra, Arocon Roofing and Construction, LLC
What is the wall construction of the home?
Before making a recommendation about painting, you have to know what the vapor permeance and structure of the wall is. Improper placement of a vapor retarder can have disatrous implications.
WoW Home Solutions
Bekah,
It is perfectly fine to paint brick. Here are some things to consider. You need to clean it fiirst. I recommend a thorough power wash with a 25 degree tip. Keep the nozzle back at least six inches while you are doing this. Then, you need to rub your fingertips across the brick and mortar. If a lot of particles are dislodged, you need to apply a masonry conditioner. This will help bind the particles together. If no particles, or very few, are dislodged, then apply a masonry primer. Remember to let the surface dry for at least three days after the powerwash. You are forcing water throught the brick and it will take a few days for it to dry. After the primer or conditioner has dried, apply a high quality latex or elastomeric paint. You will enjoy your work for many years.
One proviso: Do not paint the brick if it is horizontal like the top of a planter. That will peel and very quickly. However, painting on brick on sidewalls is perfectly fine.