Suitable for indoor and outdoor use*Glass cleaner can be used to maintain the mirrorDust the surface regularly to avoid build-up of pollutants, which may cause the surface to rust. Do not use harsh abrasives to clean any metal surfaces.Clean with fresh, soapy water at least 3 monthly or more as necessary and dry thoroughly after cleaning.* The treated steel frame can eventually rust, and should be kept as dry as possible to improve its lifespan. If surface rust appears it should be polished off to avoid it spreading.The time it takes for rust to appear will vary depending on its exposure to the elements, how often its cleaned and proximity to coastal conditions.