1. Mailbox care amp maintenance of your mailbox Many mailbox installations are in areas that expose the mailbox to road salt from snow ice removal this can be very damaging to the painted metal surface Also locations near the ocean expose the surface to salt air which is highly corrosive Pollution from automobiles acid rain and polluted air in general will also damage the painted surface A periodic cleaning of the painted surface of your mailbox with a mild detergent water and soft brush will help keep your mailbox lasting for many years In addition a clear spray no buff car wax can help protect the painted finish This process is recommended 2 3 times a year if possible This quick maintenance will help your mailbox last for many years to come