I went searching for an answer in the archives but got way too many results to find what I was looking for. What I'm trying to get an answer to is how much of the blade is hardened in the typical Bilton. When I was playing with a villager using various foods for a patina, I got a hamon from a dose of ketchup. I tried this on the more polished Bilton and only clouded the finish. Any knowledge, or good ideas would be greatly appreciated.