That's a pretty good shine considering you maxed out at 600 grit. I don't see any sign of scratches in your photo. What was your buffing procedure?
OOPs,Sorry guys, forgot to put in dimensions.
It is nothing but a trial piece, 5in x 1in.
This was just a piece of scrap jarrah, the squarish end is where the drive dog was and obviously the other end was the tail stock live centre. There was no attempt to do anything with the ends.
Cheers,
Bob.