Hi, I have a deck swing that was quickly put together when the deck was made. I would like to fix it up so it looks nicer.

The posts are 2 4x4's bolted together and set into the ground. And the beam is 2 2x6's nailed together. The posts were set into the ground before the concrete footings were poured. As shown in the picture there is some splitting and warping with the frame.

Is there something I can put over these posts or would I need to remove them. Either way, I am looking for suggestions on what materials to use and how to do this. Thank you.