You have to remember that Livi, applies much more Chrome Oxide than anyone I have seen.
It does seem to work for him, but applying that much, you run the risk of contamination.
I have removed old dirty paste on small vintage loom strops with a paper towel sprayed with WD40 and it does remove it well, with no ill effects to the leather.
So , I suppose if applied that heavy, you could wipe occasionally with some form of solvent. To emulsify the paste.