Agreed. I think one reason people want this kind of polish is that the sword will photograph well, and in fact i read somewhere that some polishers use acid etched hamon to photo and then redo the finish polish for delivery. This can be seen as a destructive sales practice. I have used weak acids such as lemon juice and vinegar on my own self forged blades to help see the hamon on modern steel, which is then polished out; on a Japanese blade with a good hamon, this step is unnecessary. Some have been accused meritlessly not long ago of using acid on a sword which has a particularly good hamon contrast; as I said, this would be unnecessary. Shortcuts and preservation are mutually antagonistic.......thank you for your words, Kunitaro-san.