How do you properly wipe on polyurethane to achieve a smooth and even finish?

To properly wipe on polyurethane for a smooth and even finish, apply a thin coat using a clean, lint-free cloth in long, even strokes following the wood grain. Allow the first coat to dry completely before lightly sanding with fine-grit sandpaper. Repeat the process for additional coats, ensuring each layer is applied evenly and allowed to dry fully for a professional finish.