Ah I see... Thanks JFWR. I finally wore my EG outside for the first time after 4 months, on paved roads, now winter is past. The soles are nice and scuffed and dusty now.
well, I realized that although the shoes look nice in factory condition, I could never bond with them, and nor would they patina, unless I wear them without a care... but still take care of them ?
It is a pity that our lovely leather soles won't look fine forever. But in general, leather soles require no special care. Sometimes some neutral cream polish is called for every few months, but honestly you want them to retain their tough character which will keep them from wearing down.