Black stain spreading on keris during vinegar cleaning

[jagabuwana]

Originally Posted by Jean

My own appreciation: Quite good cleaning results, some faint traces of rust visible on the sorsoran and ganja, about equivalent of what I get with vinegar but with slightly better pamor contrast.

For me, it didn't go nearly as dark just using vinegar. Though if I could retain the slight contrasts that vinegar gives the blade, I would. I quite like it.