This finish will continue to oxidise and age as it is an unlacquered finish, meaning the finish will darken over time. If the product becomes tarnished or too dark, it can be polished on all surface areas to enhance the finish. To restore and brighten the finish, we recommend polishing with a dry cloth or alternatively using our ‘Brasso’ (73102), which assists with the cleaning of solid brass products. Regular oiling of all moving parts using our ‘3-in-1 Oil’ (92337) is beneficial to the longevity of your products & highly recommended during initial installation. An oily cloth can also be used to wipe over the product from time to time to aid protection against exterior or environmental elements.