Foreword. SP, it allows for some staining ember 7, Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals. Surface preparation using this is SSPC-SP Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals. SSPC-SP Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals. This standard, like SSPC-SP, involves. This standard defines the “Brush-Of