Human: What are the benefits of using a sand blaster? Assistant: 
The primary benefit of using a sand blaster is that it can be used to remove paint, rust, and other contaminants from metal surfaces. This makes it an effective tool for cleaning and preparing metal components before painting or coating them. It also provides a more consistent surface than traditional methods such as sandpaper or wire brushes. Additionally, the use of compressed air helps to ensure that the entire surface is cleaned without leaving any residue behind.