Anybody who worked on Hunters, single engine Wessex, or Belvederes will be familiar with Avpin. We had a guy on Belvederes who swallowed some, on that aircraft the Avpin tank was up high on the side of the cabin, you had to stand on a hook on ladder, and pour the stuff in from a plastic can.
This guy fell back off the ladder, and Covered himself in Avpin, the sick bay kept him in, and checked his blood pressure every few minutes, but he was OK.