A dry finishing process that produces a durable, high‑quality surface finish.

• A. Anodising
• B. MIG welding
• C. Turning
• D. Powder coating

Answer: (D)

Dry finishing involves applying a coating without liquids. Powder coating fits this perfectly: a dry powder is electrostatically applied to a grounded part and then heated to cure, forming a tough, uniform film. This results in a durable surface that resists abrasion and corrosion and can be finished in many colors and textures. Because there are no solvents, it also tends to have lower VOC emissions and can build up thicker, more consistent coatings on complex shapes.

Anodising, while it also hardens and protects surfaces, is an electrochemical wet process that uses a bath, not a dry coating. MIG welding and turning are fabrication/manufacturing processes rather than surface finishing techniques.