We moved into a brick house not too long ago. There are a few areas that were renovated at some point and the mason did a poor job. It looks like some cement was put in after the bricks were laid and was smeared over the faces of the bricks. It's unsightly and doesn't match the adjacent areas where the work wasn't done. How can I clean this up?
dirty bricks on the left, clean older bricks on the right, beyond the railing.