Hyatt Regency St. Louis at the Arch, St. Louis. The Annual Shot Peening and Blast Cleaning Workshop is three days of information on all aspects of shot peening and blast cleaning processes. Held in a different city every year, the U.S. Workshop is the largest shot peening training event in the world. Industry professionals offer expertise in their specific field and world-class companies exhibit shot peening and blast cleaning products and services. It's also an invaluable opportunity to meet with your peers and industry professionals from around the world. Product design engineers, machine operators, foremen, supervisors, maintenance and quality engineers will benefit from the workshop.