Muirenn….there are waterbased, non toxic and no voc acrylic paints/markers used for graffiti. From the photos that looks like what Nocket used. Removal can be the problem Nocket should have had in mind...among other things

I think my generation (Y, millennium whatever) saw artistic graffiti/street art overcome the gang graffiti that freaked out older people. It was also fused with the hip-hop music of my generation. For me it was/is just about knowing and interacting with the neighborhoods where the art form lives on.