What is polishing concrete? How is it done? Today we’ll give a basic overview of the concrete polishing process. So, what is it? Polishing concrete is similar to the process of sanding wood. With polishing concrete machines are used that have diamond-segmented abrasives. The machines grind the concrete to varying levels of shine and smoothness depending on what is desired. Polished concrete floors are very low maintenance and are ideal in high traffic areas.