What is most notable about this is that nobody seems to actually know anything about the impact (if any) on low level GA, e.g. below FL100 or FL200.
The NOTAM put out by NATS is pure ar*se covering material.
If this stuff (which is quite invisible right now, at low levels) is capable of stripping paint off, what is it going to do to one's lungs?
To me, it seems there is NO danger whatsoever at VFR-GA levels.