Enggano spear / Ekajo

[kai]

Maybe a bit of acetone applied in a small patch with a cotton swab somewhere unobtrusive would tell you something

Acetone will pretty much dissolve any residue regardless of origin - I won't go that route.

Detlef may be quite right that these are fat and smoke deposits from cooking.

Since this is a kinda "tribal" piece, I'd leave it as is.

Regards,
Kai