The roof leaked around the brick chimney and the ceiling paint chalked onto the brick. How to clean brick?

I dont like to use acid, do to the fact that the fumes and liquid are toxic, First you can try a wire brush and some soap %26amp; water, If that does not work lowes has a few products that work really well. It may have acid in it but at least its already in a spray bottle, Last choice pure acid.The roof leaked around the brick chimney and the ceiling paint chalked onto the brick. How to clean brick?
acid from a brick supplier