To address all the criteria above, the earlier works of acidic redox-assisted deposition (ARD) have been shown to be capable of producing uniform, continuous, and void-free metal oxide thin films with strong adhesion. Such technique can be applied on diverse substrates such as wood, glass, or metal among others, through simple immersion onto the deposition mixture in the ambient conditions. Compared to the well-known alkaline precipitation where oxidation states of metal cations remain the same, ARD and the precipitation approaches (ARP) are emerging alternatives uniquely featured with tunable oxidation states, homogeneous multi-element distribution, and strong adhesion without the needs of thermal annealing. In addition, the ARD oxide coatings can incorporate from two (Co-Mn, Cu-Mn), three (Fe-Co-Mn), and up to four (Ag-Ce-Fe-Mn) different metal cations in a single layer. Following the simplicity and versatility of the technique, we propose that ambient-condition ARD is promising to dope all the antimicrobial active cations in one coating via an intuitive, convenient method for the public, such as hand sprayer.