It is crucial to carefully bury the posts. It is recommended to use pressure-treated wood for increased longevity. If you prefer to use untreated wood, it will need to be treated against insects and rot. It is also advisable to apply paint or varnish to the buried part of the posts, as well as tar or bitumen to prevent moisture from penetrating the wood. Once these steps are completed, you can bury the posts and finish the fence. The importance of choosing a quality finishing product and applying it correctly should not be underestimated, as this will increase the longevity of the fence.