[header] How to paint a mailbox [title] Remove the mailbox from the wall or post, if you can. [step] It should be screwed on. Be sure to save the screws some place safe so that you can reattach the mailbox later. 
If you cannot remove the mailbox, you will need to cover the post or the surrounding wall with some masking paper and painters tape. [title] Remove all parts from the mailbox, if possible.