Keris lurus/sepokal Bugis for comment

[jagabuwana]

First time staining attempt:

I made up a paste of
*1tbsp powdered sulphur
*1tsp salt
*Rice water

I brushed it onto the blade after cleaning and drying, and covered it in cling/saran wrap.

I checked on it this morning and it looked like black squid ink and rust in there. I got worried so I rinsed all the sulfur off and gave it a scrub with detergent.

I have a feeling that had I left it in there it would have turned very black. This is what it has looked like after roughly 20 hours.

Based on the above, what should I be doing anything differently or should I have stayed the course?