This series of products is mainly used for cleaning various metal surfaces with localized rust, paint, coatings, oil stains, oxide films, and other pollutants. It can also be used for cleaning the surfaces of non-metallic substrates such as ceramics, glass, and composite materials. Typical application scenarios include cleaning of natural oxide film on aluminum alloy before welding, cleaning of black and gray oxide on battery trays after welding, cleaning of welds on train bogies before non-destructive testing, cleaning of automotive sheet metal parts before refurbishment, and cleaning of parts of steel components such as small holes and grooves that cannot be reached by wire brushes.