Their Grammy was getting rid of an old black metal mailbox and they saw it by the curb.
Parental supervision is recommended.
How To Make It Using the sandpaper or steel wool, lightly sand to take the shine off. Sand any rust spots to the bare metal. Use the tack cloth to remove any residue. Remove flag from mailbox using appropriate tool if possible, or cover with masking tape to protect from unwanted paint color. If you don't want certain parts of the mailbox painted, be sure to cover with masking tape if they cannot be removed.