Sandblasting is a surface treatment process that uses high-pressure air or other forces to propel abrasive materials, such as sand, onto a surface. This technique effectively removes contaminants, rust, or old coatings while preparing the surface for further treatment, such as painting or coating. Sandblasting is widely used in industries like construction, manufacturing, and restoration due to its efficiency in achieving clean, smooth, or textured finishes on various materials, including metal, glass, and concrete.