The Stone Henge people are saying that the water, lichen, and powder would have reacted badly. I do not have the education to know if that’s true or not.
Meh.
Their job is to defend stonehenge at all costs. They wouldn’t let people look at it if they could get away with it.
Of course they’re going to say that the powder is reckless and could potentially upset the lichen or something.
It’s hard to believe that this stunt could have any measurable impact in another 10 years or so.