The document discusses different methods for surface preparation and cleaning prior to coating application. It outlines 6 stages of surface preparation including cleaning, removing old coatings and contaminants, profiling the surface, and drying. Various mechanical, chemical, and solvent-based cleaning methods are described at length, including abrasive blast cleaning levels from light blast to white metal blast. Flame cleaning of structural steel is also mentioned. The document provides detailed classifications and standards for solvent and abrasive blast cleaning methods.