Back in the days when i was just a poor boy raising a family had to improvise, 63 years later.
If i had to hone a brake master or brake or clutch slave cylinder that was larger than my hone I would grab or make a wood dowel then cut a slit into one end to hold the sand paper in place. The slit has to be wide enough to accept folded paper otherwise one side of your makeshift hone will be the backside from one side will be the backside of the paper without grit.
I needed to sand the inside of my kaleidoscope shell and this is the setup I used, of course if your honing a brake cylinder your going to use a drill.
With the lathe running I hold onto the tube then work it back and forth on the mandrel.
The black inside the tube is charcoal, I've used to torch to blacken the inside to absorb any stray light sources, it's not finished yet more burning to do. The mirrors will also be painted black on the backsides and edges.
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