>>511422909
>What was this magic coating?
there is no magic, its just calcium sulfate dihydrate. never heard of plaster of paris?
>How did they produce it in mass quantities and how did they glue it to the walls?
mined it and mixed it with water.
again no magic here.
>Also what kind of pumps did they use to remove their finished products from their stone chambers?
they had a bunch of drain shafts. and for pumps they probably used a force pump or other shit like an archimedes screw..
>How did they keep it from being contaminated?
the acids were used for leach mining which was right on site next to the pyramids.
see the "Tomb of Birds" mining tunnel for example or the "Boat" shafts all over the Giza plateau. they also knew how to manufacture glas.
>How did they not die from the Ammonium vapours?
a wet cloth over the nose is not magic.