sandblast

Imagine you want to strip old paint off a weathered wooden boat or roughen up a surface so new paint will stick. You might sandblast it. This process uses a strong stream of sand, or a similar rough material, blown by compressed air to strip away coatings, clean surfaces, or even carve designs.

It's not just for boats and metal, though. Sandblasting can be used on everything from brick walls to glass, and even on more delicate materials if it is carefully controlled. Think of it as very powerful scrubbing, but instead of soap and water, it uses grit and force. The term can also be used figuratively to describe someone being hit with harsh criticism or a flood of questions: "The politician was sandblasted by the media after the scandal."

To sandblast is to clean, smooth, etch, or prepare a surface by shooting a fast stream of abrasive material, usually sand or something similar, with compressed air. It is a strong surface-treatment method used in many kinds of work.

The process was patented in the late 19th century and became common in shipbuilding, construction, and manufacturing during the 20th century. It is useful for removing paint, rust, scale, or other coatings from metal, wood, stone, concrete, glass, and more. The rough action can also leave a textured surface that helps new finishes, such as paint or powder coating, stick better.

However, sandblasting is not limited to cleaning. Artists use it to make designs on glass or stone, while restorers may use it carefully to uncover the original details of older objects. Modern forms of the process often use other abrasives, such as aluminum oxide or steel grit, instead of sand, depending on the material and the result wanted.

Beyond its literal meaning, "sandblast" can also be used figuratively. If someone is "sandblasted" with questions or criticism, they are being hit with a harsh, nonstop stream of them. Whether you are restoring a classic car, preparing metal for painting, making art, or facing intense public criticism, sandblasting, in either its literal or figurative sense, suggests force, pressure, and abrasion.