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Garry flex abrasive block, that's exactly what it is, thanks!

No, this isn't an ink eraser, I just used that as an example as it's similar to an ink eraser. This came from a watch repair specialist.

I have this little "eraser" that removes scratches from burnished surfaces.
Its like an eraser i had in my pencil case as a kid, remember one half was for pencil, the other half for pen. Well its...