In one of my small holing pens I have a piece of cement that extends into it by about 5 feet that is from an old hog shed. The cement is in perfect shape, about 4" thick and SMOOTH. I have had a few calves slip on it, and would like to rough it up somehow so the cattle get some traction. Is there an acid or something I can pour on it that will eat into it a bit to give it a rougher touch?