How to properly stain and polyurethane wood for a professional finish?

To properly stain and polyurethane wood for a professional finish, follow these steps:

1. Sand the wood surface to remove any imperfections and create a smooth surface.
2. Apply wood stain evenly with a brush or cloth, following the grain of the wood. Allow it to dry completely.
3. Apply a coat of polyurethane using a brush or foam applicator, following the manufacturer's instructions. Allow it to dry completely.
4. Lightly sand the surface with fine-grit sandpaper between coats of polyurethane to ensure a smooth finish.
5. Apply additional coats of polyurethane as needed, allowing each coat to dry completely before sanding and applying the next coat.
6. Once the final coat is dry, buff the surface with a clean cloth to remove any imperfections and achieve a professional finish.