Anything is possible these Days!
For decades they said you can’t drill a square hole – we’ll check this out, the Chinese found a way.
They also said you can’t make an effective graffiti coating for buildings invisible to the human eye.
The Graffiti Eaters found a way!
For full detailson invisible graffiti coatings including datasheets, photos and a video showing removal results, click on the hyperlink.