Citric soak

[Sajen]

Originally Posted by A. G. Maisey

In fact, I personally regard soaking as a "lazy-man's" way of cleaning blades. Yeah, sure I've used it and used it many times, but I do not believe it is the best way to clean any blade, including keris. I do believe that painstaking mechanical cleaning followed by careful acidic brushing is probably the best way to clean the blades of S.E.Asia.

Very good said! And again my full agreement.