They sit quietly all around us, faded by the years, advertising products and businesses that often no longer exist — Plume Motor Oil, Excelsior Coffee, Bex Powders, and all manner of brands of soft drinks, clothing lines and confectionery now lost in time.Ghost signs — they're found in our towns, suburbs and cities in the form of old billboards or shop hoardings that have somehow survived redevelopment, or simply being painted over.GUEST:Sophie Roe, Masters of Heritage and Museum Studies Sydney University.

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