Trying to finish up a remodel on a 1840’s Charleston Single in Charleston, SC.  The homeowners have moved there bedroom into a room that has exposed brick walls.  Great looking, but they don’t want the dust that comes from the old brick.  Naturally I want to tell them that they live in a 160 yr old house and to deal with it, but that is not the approach I am going to take.  Is there any way to seal the mortar and or brick, but retain the natural apperance.