It is mechanically abraded, de-dusted, loose-debris-free steel with permissible stains and tight mill scale. Use it only where coatings are forgiving and service environments are mild. For the full legal text, tables, and inspection checklists, purchase the official AMPP/SSPC SP-03 PDF – it is a 6-10 page document that has shaped industrial maintenance painting for over six decades.
SP 3 exists for scenarios where (logistical, safety, or contamination risks) or where the coating system specified is low-to-moderate performance (e.g., maintenance painting in occupied facilities, interior structural steel, or thin-film shop primers). sspc-sp 3 pdf
Many contractors confuse SP 3 with . The PDF for SP 11 requires complete removal of all mill scale, rust, and coating, leaving only a uniform metallic sheen with a minimum 25 µm profile. SP 3 exists for scenarios where (logistical, safety,
"The removal of all visible oil, grease, dirt, dust, loose mill scale, loose rust, and loose paint by power-assisted tools." "The removal of all visible oil, grease, dirt,
Once you have obtained the official , here is how to use it effectively on a job site.