Creating a hammered or hand-textured finish on metal sculptures adds depth, character, and a unique artistic touch. Here are the most effective techniques to achieve this look:

1. Traditional Hammering: Use ball-peen hammers or chasing hammers to strike the metal surface, creating dimples or patterns. Varying the force and angle produces different textures.

2. Stamping Tools: Custom stamps or textured punches can imprint designs like scales, lines, or geometric patterns. Heat the metal slightly for easier imprinting.

3. Chasing and Repoussé: This ancient method involves hammering from both sides of the metal to create raised or recessed designs, ideal for intricate details.

4. Grinding and Abrasives: Angle grinders or sandblasters can roughen surfaces for a rustic look. Combine with hammering for layered textures.

5. Chemical Patinas: Apply acids or oxidizing solutions after hammering to enhance texture contrast and add color variations.

For best results, experiment on scrap metal first and wear protective gear. Each technique offers endless creative possibilities for sculptors.