How can I achieve a durable finish for my wooden furniture using polyurethane over stain?

To achieve a durable finish for your wooden furniture using polyurethane over stain, follow these steps:

1. Sand the wood surface to ensure it is smooth and free of imperfections.
2. Apply a coat of stain to enhance the wood's color and grain.
3. Allow the stain to dry completely before applying a thin coat of polyurethane using a brush or cloth.
4. Let the polyurethane dry according to the manufacturer's instructions.
5. Lightly sand the surface with fine-grit sandpaper between coats for a smooth finish.
6. Apply multiple coats of polyurethane, allowing each coat to dry before applying the next.
7. Once the final coat is dry, lightly sand the surface again for a smooth finish.
8. Your wooden furniture should now have a durable and protective polyurethane finish over the stain.