Found this katana at an auction;the blade and kissaki look like they’ve been heavily polished or ground down. What could have happened to it? A quick wartime polish, or did some owner ruin it over the years? The kissaki is almost gone, and there are dark stains that almost look like old blood…   The shape reminds me of a tired, over-polished blade maybe a showato that saw rough use in WWII and was later cleaned up in a hurry? Or worse, someone took a coarse stone to it, grinding a