Black stain spreading on keris during vinegar cleaning

[jagabuwana]

That looks like a nice result. In the absence of warangan I'd be happy with it.

Just to clarify Alan, did it have any of the warangan stain on it prior to doing the rice water + sulphur + salt method?

I think I'll give this another go soon. All of a sudden got a lot more time on my hands with this pandemic lockdown situation. Hope everyone stays healthy and safe