Bright or Pickled Finish refers to a type of surface treatment applied to aluminium. This process involves the removal of impurities, such as scales, stains, and rust, from the aluminium surface through the use of acidic solutions. The result is a clean, bright, and smooth surface. The bright finish not only enhances the aesthetic appeal of the aluminium but also improves its resistance to corrosion. It is often used in components where the appearance and durability of the aluminium are important.