 Heading out to Idaho, Gail's got an issue with some stains on some brick. What's going on over there? I have a question about removing mortar splash stains from exterior bricks and whether I could damage it by using maybe a metal brush on a drill so I don't have to scrub so hard with a regular brush. Now, anytime you get a stain on brick, it's really difficult to get it off because brick is so absorbent.