[The Apprentice]

Below is a picture taken from our back garden, what we are looking at is the North - South corridor route taken by the high flyers, 30,000 plus and in it are lots of trails at differeing spread patterns, an hour before this was taken in mid afternoon the skies were as clear as can be.

The build up lowered the warmth dramatically where without the blocking nature of this manmade cloud it would have been a tad warmer as the sun was just beginning to go down.

Looking due West, wind direction West to East light breeze at ground level.



Aluminum on its own would not survive the heat of the engine unless it was a larger sized particle and became nano sized after going through the heating process.
Now I came across this interesting photo of a device being made by a local company which the title of the photo says aero engine mixer, Darchem is the company name.



If this device was being used inside the engine to mix liquids with air into a mist and put through the outer jacket or channel around a turbojet engine, like the one below, chemicals  could survive the compression stages, thus adding the ingredients to the fuel would work as intended.
Such ingredients could easily be added to fuel and named anything so as not to raise concerns, just a thought.

Notice the picture below does not designate the outer jacket and arrow, here is where alternative liquids could be added and run through the engine without much damage.