Sonobudaya comes up as a risky site, I dumped it.
First youtube, no comment
Second youtube, fair job
both youtubes were pretty abbreviated processes, I doubt that in the hand I would be satisfied with either result, these were just "touch-up" jobs.
the reason for peeling the lime before squeezing is that you can extract more juice from a peeled lime than from an unpeeled lime, especially if one does not own a lemon juicer.
personally, I like to avoid staining an older blade if it is reasonably free of corrosion and the pamor can still be read, often a wash under running warm water with dishwash detergent, and then a WD40 spray will give an acceptable result.
I do not use anything to attempt neutralisation of acids when I do an arsenic stain, I rinse thoroughly under running water & massage with my fingers, I pat dry with a lint free cloth, & I sun dry before oiling.
I do use bicarb slurry when I stain with ferric chloride, but we do not use this on tosanaji.
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