I can't explain this next step, but the pictures make it obvious. I think the Idea is that if the handle material shrinks or expands for whatever reason, it will be less noticeable than if the handle was flush with the fittings. I just think it looks nice.
To begin with, I scribe a line around the spacer.
Then I roll the edge over to that line with a sharp file.
Finishing the bevel with some 1200 grit paper (I think)
Here the handle has been finished to 1200 grit, ready to be oiled.
Pop.
I applied the linseed oil with 1200 grit sandpaper. Here it is after I wiped it down.
Now, during the next few days, it became apparent that I hadn't in fact removed all the course grit scratches. The scratches were very difficult to find in amongst the pattern in the wood, but sure enough they were there.
Anyway, I managed to drag myself back into the workshop and started re-sanding at 600 grit. Oily wood clogs up 600 grit sandpaper very quickly.
The scratches seemed almost like bruises, they didn't seem to have depth. Anyone experienced this?