The use of mild soaps, detergents and aqueous base solvents is best for general aircraft cleaning.
Engine exhaust deposits and other stubborn stains can be cleaned with petroleum based or mild
40
caustic solvents. When cleaning, always use the minimum amount of material to do the job and
avoid over spraying, showering and splashing solvents. Also, to enhance recycling capabilities, use
the minimal number of solvents per cleaning. Keep spent solvents separate and avoid mixing
solvents with contaminants such as waste and other solids.