It's worth noting that the corrosion that you can see on the blade that I shared was not due to the sulphur treatment.
From my eyeballing, the blade didn't appear to get worse after this treatment, compared to how it was before. Something that I have noticed and has been difficult for me to control is the appearance of brightly rust-looking patches on the blade after a sulphur treatment. It's easy enough to remove with a brush, water and detergent, but this also removes some of the staining.
But I can understand why you would be reluctant to do this on a blade that you value, or one that you would otherwise not want to treat in this way.
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