How can I achieve a smooth finish on wood edges by rounding them?

To achieve a smooth finish on wood edges by rounding them, you can use sandpaper or a router with a round-over bit. Sand the edges in a circular motion to gradually round them off, starting with a coarse grit sandpaper and finishing with a finer grit for a smooth finish. Alternatively, you can use a router with a round-over bit to quickly and evenly round the edges. Be sure to wear appropriate safety gear and work in a well-ventilated area when working with wood and tools.