He stabilized the wood for the purpose of chasing threads in softer wood. The threads came out very well.
I WILL have a video out soon on lining up the grain and how it is done in a threaded project.
This is a link the video showing HOW TO line up the grain in a similar box: https://www.youtube.com/watch?v=cYQlqiEnujk
For more on thread chasing, check out this playlist
To see my work visit samangelo.com or wyomingwoodturner.com