Though some of the other properties - especially withstanding ~1,000 °C - make it sound pretty useful for military equipment which might be facing weapon-grade lasers or nuclear fireballs.
It's going to be <80% after a week in real life due to dust &co anyways
Reaction II: OTOH, the article says zilch about the stuff being dirt-repelling, or trivial to clean. And considering just how bad the air often gets, in some of the world's largest cities...
They talk about "nanostructures", I read it as "dust traps"
Just looking at my window stills give me a good idea of how they'll look if they're anywhere remotely close to a road, and that's in a "clean" western european city
This is often the case for percentages "close" to 100%, e.g: with LED efficiency, for powerful LEDs the problem is not the quantity of light emitted but dissipating the heat that may need active cooling, so what may look like a few percent improvement is luminosity may actually be a much stronger decrease of the size of active cooling,
Or semi-transparent mirrors in physics, where you really make a difference between 99.95 and 99.96% reflectance, because what you really look at the transmitance.
85% -> 99.6% is an improvement, but not like a game-changer.
There seems to be many factors when looking at the actual cause and effect especially when cost is introduced.
I wonder if it can be used in spray applications like other ceramic coatings.