I've got this little Retro 51 mechanical pencil which I frequently carry as a backup. it takes 1.1 mm leads.
Unfortunately, the black lacquer coating flaked quite badly. I don't think I abused it, but I didn't treat it with kid gloves either. It was quite ugly looking.
The solution, was to cover it with some heat shrink, and shrink to fit. Looks pretty good, I think.
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