The coatings might do something for longevity.
Sometimes I forget how sharp we can make razors, and then I do something like yesterday and run a razor through the oxides and shave with it and then it cuts off every single pimple and bump I have on my face, and I have to rub beeswax and oil mixed on my face so that I don't get razorburn that turns into bumps that get shaved off the *next* day.
Back to the linen and natural stones. Jeez.