What is a key characteristic of 'wet wash' aircraft cleaning?

The key characteristic of 'wet wash' aircraft cleaning is that it is effective against oil and grease. Wet washing involves the use of water, detergents, and sometimes heated solutions, which help dissolve and dislodge contaminants like oils and greases from the aircraft's surface. This cleaning method penetrates and emulsifies oily residues, making it suitable for thorough cleaning of components that might be heavily soiled.

While wet washing can indeed help remove dust and debris, its primary advantage lies in its ability to tackle more stubborn contaminants such as oil and grease, which are commonly found on aircraft surfaces, particularly in areas like the engine nacelles or landing gear. It is also worth noting that this cleaning method is not restricted to just the exterior surfaces; it can be used in other areas of the aircraft as well, and while some cleaning may require specialized equipment, traditional wet washing relies more on basic cleaning tools and solutions rather than advanced technical apparatus.