How can I achieve a smooth and even finish when working with flat cut wood?

To achieve a smooth and even finish when working with flat cut wood, start by sanding the surface with progressively finer grit sandpaper. Apply a wood conditioner before staining or painting to help the wood absorb the finish evenly. Use a high-quality brush or sprayer to apply the finish in thin, even coats, following the wood grain. Sand lightly between coats for a smooth finish.