What are the best techniques for sanding brick to achieve a smooth finish?

The best techniques for sanding brick to achieve a smooth finish involve using a coarse grit sandpaper to remove rough spots and then gradually switching to finer grit sandpaper for a smoother finish. It is important to sand in a circular motion and apply even pressure to avoid creating uneven surfaces. Additionally, using a sanding block or sanding sponge can help maintain a consistent level of pressure and prevent over-sanding in certain areas.