TIL: During WWII, a Special Paint was Used on the Hood of Jeeps that Changed Color if Exposed to Chemical Weapons

I've never seen a Jeep model that had this feature, but I figure I've got to add it to my next one.

Something similar was applied to post boxes in the UK as well to warn against gas attacks.

I think that the same type of paint was applied to the wings of RAF airplanes in a square during the invasion scare of 1940.

I believe I read it was also applied to some helmets in the 82nd airborne prior to D day if memory serves