Creating a flawless, mirror-like finish on metal sculptures requires precision and the right techniques. Here are the most common methods used by artists and craftsmen:

1. Hand Polishing: Using progressively finer grits of sandpaper or abrasive pads, artists manually smooth the metal surface. This method is ideal for intricate details but demands patience.

2. Buffing with Power Tools: Rotary tools equipped with soft wheels and polishing compounds (like rouge or diamond paste) can quickly achieve a high shine. This is efficient for larger surfaces.

3. Electropolishing: A chemical-electrochemical process that removes microscopic imperfections, leaving an ultra-smooth, reflective surface. Often used for stainless steel sculptures.

4. Lapping: Employing a fine abrasive slurry, this technique ensures an even finish by rubbing two surfaces together under pressure.

5. Chemical Polishing: Acids or alkaline solutions dissolve surface irregularities, though this requires careful handling to avoid over-etching.

Each technique has its strengths, and combining methods often yields the best results. The choice depends on the metal type, sculpture size, and desired level of reflectivity.