Using the Deltana 4 - inch Residential Letter O is easy. You can use it to personalize your home by attaching it to your front door or entryway. For marking your mailbox, just place it in a visible spot. When attaching, make sure the surface is clean and dry for a better hold. As for maintenance, use a soft cloth to wipe it regularly to keep its shine. Avoid using harsh chemicals as they may damage the finish. In case of any scratches, you can gently buff the area with a brass polish. If you live in an area with extreme weather, it's a good idea to check the attachment periodically to ensure it stays secure.