Which of the following is a typical SSPC SP1 pre-cleaning method?

The typical SSPC SP1 pre-cleaning method is chemical paint stripping. This process is designed to remove all types of contaminants, including existing coatings, rust, grease, oils, and dirt from the substrate prior to surface preparation and coating application. Using a chemical paint stripper allows for a thorough cleaning, effectively removing layers of paint and contaminants that mechanical methods might not completely eliminate.

Chemical paint stripping is particularly effective for surfaces where mechanical cleaning could lead to damage or roughness that may not be acceptable for some coating applications. Its application is consistent with SSPC standards, which emphasize the importance of clean surfaces to ensure the effective adhesion and longevity of new coatings.

Other methods, while useful in their own right, do not specifically align with the SSPC SP1 designation for pre-cleaning. For example, dry grit blast cleaning is a form of abrasive cleaning that can potentially modify the surface, while steam cleaning is effective, it does not typically meet the stringent requirements for pre-cleaning as set by SSPC SP1. Power tool cleaning generally involves brushing or grinding, which may not fully strip previous coatings or contaminants as thoroughly as chemical methods.