What is polished concrete, and how is it used as a decorative and functional flooring option? What are the benefits of using polished concrete over other flooring materials, and what are some common applications for it? How is the final look of polished concrete minneapolis affected by factors such as aggregate exposure, color, and gloss level? What is the maintenance process for polished concrete, and how does it compare to other low-maintenance flooring options? What is the installation process for polished concrete, and how does it compare in terms of cost and timeline to other decorative concrete options such as stamped concrete or acid staining?