One result from walking with the poodles around Adelaide's CBD is that my 'walking Adelaide' usually involves wandering down the various laneways and the back alleys as well as into the various carparks. In doing so I occasionally stumble across an interesting image, or even two, in a few of these back alleys.
An example from January 2019:
Usually these signs/images are on the walls of an alt-Adelaide (the seedy underside of Adelaide), and they have been there for many a year. They are off the main pedestrian thoroughfares, and so they are been forgotten and unseen. So they slowly decay over time until there is a major urban development, which its usually a hotel, a block of student apartments or an office block.