The process of sanding leather to remove surface imperfections (see corrected grain pigmented leather) or produce suede or nubuck.
Found on http://www.encyclo.co.uk/local/20213
Sandpapering the leather with sandpaper or emery paper for various reasons such as the creation of a suede like nap on suede, a nubuck finish on grain, or for the preparation of corrected grain leather. Sometimes done on the flesh side to tidy up its appearance.
Found on https://www.encyclo.co.uk/local/20861
The process of removing thin layer of grain side of sole or insole by use of abrasive to give it a finer look or to allow penetration of colour and prevent cracking. Found on https://www.encyclo.co.uk/local/23292