Anthony, I avoid the staining of older blades that bear kinatah work, I have done a few that were fairly heavily rusted, & for those I used nail lacquer to protect the kinatah work. It should be noted that I never use the soak method of staining, I use brush & finger pressure.
For any older blade where the blade can be read, I usually do not stain.
I have had current era blades that bear kinatah & have been competently stained, I do not know what method the m'ranggi has used to to the job.
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