A Per Diem Sand Blasting job involves cleaning or preparing surfaces, such as metal, concrete, or wood, by blasting them with abrasive materials like sand. 'Per diem' means that workers are paid a daily rate and often work temporarily or travel to different job sites as needed. These professionals use specialized equipment to remove paint, rust, or other debris from surfaces, making them ready for painting, coating, or repair. Safety training and protective gear are essential due to the hazards associated with sandblasting. This type of work is common in industries like construction, shipbuilding, and manufacturing.