Yes, i have also bought a number of keris from Adni and he does, indeed, use a most pleasant keris oil on them. I have also bought the oil from him.
Penangsang, you seem to have more intimate dtails of Hana's situation so i will wait for Hana to add more information. Personally i both smoke
and oil my keris and have always considered both acts to be a form of "feeding" the keris and it's spirit. I am not as aware of Hana's personal beliefs as you seem to be so i can not persume to suggest any alternative feeding methods.
