You know, you're absolutely correct to ask about what good it does
In having present day coating technology on knives.
Considering that very few finishings can remain unblemished for long....
so yeah, it seems very cosmetic.
and like any make up, just how many times must a fashionable girl powder up
just to touch up marred spots in a day?...
Looks like knife coating technology is very much a work in progress.
and so far, the better ones seem to be economically out of reach for general consumption.