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What are the differences between a sandblaster and a sander?
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1.  The primary difference between a sandblaster and a sander is that a sandblaster uses abrasive materials such as sand or glass beads to blast away material, while a sander utilizes softer materials like wood or plastic to smooth surfaces.
2.  A sandblaster can also be used for more aggressive cleaning jobs than a sander, since it can remove paint, rust, and other stubborn contaminants from surfaces.