OK, just for one instant, I’m going to be Mr Grumpy; Did he have permission to do this? If not, there’s an arrogance in the assumption that what he is doing is acceptable, especially on the ironwork of that bridge, which I can imagine will be difficult to clean. Sorry.
Well I had never heard of this artist and to be fair the gum is already on the street/bridge when he begins to paint these incredibly small pictures. To begin with I thought he was depositing the chewing gum himself but not the case.
hope you go back later for end results