We have mentioned once here the intrigued on-the-wall paintings of Wild Drawing who enjoys the street art and graffiti because of its ephemeral nature of the paintings. 

“Each art work has a limited life span before it is destroyed by the weather, by decay or perhaps by council employees “cleaning up” the wall by painting over it. Of course, street art murals also fall prey to other street artists who sometimes add to a piece but generally detract from existing pieces by tagging over them or stenciling or placing stickers. This process of gradual degradation is a peculiar one, and it’s one that Wild Drawing has taken an interest in, saying that if he wanted to make works that stood the test of time, he would only paint on canvas”, street on art read. 

You can see more on his website and streetonart.