Important Care Instructions! Thank you for your Mailbox purchase. During unpacking and installation handling you may discover some fingerprint markings on the surface of the mailbox and post. These are easily removed with the use of any multi-surface household cleaner such as Formula 408, Windex, or Simple Green. Do not use any multi-surface product containing bleach. Do not use any product containing abrasives such as cleanser powder or solvents such as prophylaxis! alcohol.