Many of the specifications I read call for solvent cleaning as the surface preparation. Whats the best solvent to use?
The most popular specification for solvent cleaning is SSPC-SP 1, from the Steel Structures Painting Council. It describes solvent cleaning as “A method for removing all visible oil, grease, soil, drawing and cutting compounds, and other soluble contaminants from steel surfaces.” Although they may be used in some situations, “solvent” does not necessarily refer to paint solvents such as mineral spirits, xylene, lacquer thinner, etc. Many contractors prefer to steam clean or use a water-based emulsion or alkaline cleaners to remove the contamination. For environmental and safety reasons, it’s best to use the mildest “solvent” that will get the job done.
