InFO Reminds Owners That Some Aspects Of A Shiny Airplane Are Covered By Regs The FAA has received reports of operators using automotive detailing companies to wash aircraft without ensuring compliance with other procedures required by Title 14 of the Code of Federal Regulations (14 CFR), and has released an Information for Operators (InFO) covering what is and is not allowable.
Source: aero newsFAA Cautions Against Using Automotive Detailers On Airplanes