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The arc wire spray is (I think) a little less than a half mm thick? A hone would still be able to knock off any glazing from the cylinder walls and provide fresh crosshatching without removing significant material. I'm not an expert on the finish BMW uses but people in the motorcycle world have been rehoning Nikasil coated cylinders for years without issue.
@Dyna+ can you post a picture of cylinder 5 wall?
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