microfinishing film
A film of dimensionally stable plastic, to which are adhered carefully graded abrasive or polishing powders, i.e., particles, having dimensions in the micrometer or submicrometer range.
Note: Microfinishing films resemble sandpaper, but have much smaller abrasive or polishing particles. They are used commercially to shape and/or polish machined parts. They are also used to finish the endfaces of certain types of optical connectors. [After FAA]