The invention relates to a cleaning product containing: (A) a developing composition which comprises a mixture of nitric acid and hydrofluoric acid, a thickener, a surfactant, an indicator, water and, optionally, a propellant; and (B) a fixing composition which comprises a base, a thickener, a surfactant, water and a propellant. The inventive cleaning product can be used to clean titanium surfaces, such as titanium panels and facades.