Rub a terry cloth towel over the scuff mark until it is gone. Terry cloth has a rough nap that can work away or lighten new scuff marks.
Rub a gum eraser over the scuff mark. Don’t use a pink eraser, because it can impart its color on the leather.
Blot rubbing alcohol directly on the scuff mark with a cotton swab.
Wipe the area with a cloth to remove any rubbing alcohol residue.
Rub a terry cloth over the unfinished leather to work away the scuff mark. The raised nap might work well enough to hide the scuff mark.
Rub a gum eraser over the scuff mark until it is gone, or until it is as light as possible.
Rub a piece of superfine sandpaper gently over the scuffed area. This will actually remove the top layer of leather along with the scuff mark.
Brush the unfinished leather with a suede brush to restore the nap.