<human>: What are the differences between a sandblaster and a sander?
<bot>: A sandblaster is used to remove paint, rust, and other coatings from metal surfaces. It uses compressed air or abrasive materials to blast away the coating. A sander is used to smooth and shape wood, plastic, fiberglass, and other non-metallic surfaces. It typically uses a rotating abrasive disk to create a smooth finish.