Oxidation also appears as rust, however, and can leave unsightly orange stains on even stainless steel. Your knife will take on hues of grey, blue and black; this is a good thing. 9,008. Forced Patina With MUSTARD: A couple weeks ago I watched a video from one of the YouTube knifemakers i'm subscribed to. It is my guess that it is a yanagi white steel knife or wide-bevel gyuto with a distinct scratch pattern from finishing, but it may be some other steel, or something completely different. Anyhow, removing a patina and maintaining a finish are different issues IMO. In some cases, this is beneficial: That dull gray patina that forms on your knives over time actually serves as a protective coating on the blade. With no disrespect to the the OP, that is a broad range of steel/knives/finish. When unwanted rust or oxidation appears on your knife blades, you have a few different options for removing it. That is due to the different degrees of corrosion resistance. Feb 21, 2012 #2. richstag. Personally, I just clean a blade in this manner, then spend time cutting thin slices of apple or potato. “You can do it with almost anything with acid in it: instant coffee, vinegar, potatoes — lots of things,” he says. (Jake'sCustomKnives He is an excellent knifemaker, and has a ton of videos. If you are into knifemaking I would highly recommend you check out his channel.) This will remove all residual oils, even the stuff from your fingers and result in a more consistent coverage of patina, no matter which method you use. Whether forced or gained over time with use, a well patinaed carbon blade is a thing of beauty. Have fun, and take your time. Think of survival knives made from, for instance, 1095 carbon steel. Looks great Rick, thanks for taking the time . LightGuy. Nov 27, 2011 #15. … “Just rub it on the blade and polish them in. It means that a patina is on the way. Last edited: Mar 1, 2012. Build Patina Early. But also on kitchen knives. With his personal knives, Pettersson says the first thing he does is force a patina onto the blade to protect it from rust. Think of a patina as a little extra help in the war on rust. Carbon blades can be sharpened finer and will hold their edge longer than stainless. Feb 22, 2007. Our Eden Kanso Aogami-knives are known for the stunning patina they form. Adam, who works in our Edmonton Knifewear, has figured out a pretty easy way to force an early patina onto a carbon steel. 952. In general patina forms on carbon steel knives. Sometimes there are major differences between the types of carbon steel or tool steel that are used. Hope this was useful. A big complaint about carbon steel is that it rusts quickly, while stainless steel does not. Wipe the steel down with a liberal dose of oil when you're finished to remove any remaining vinegar and seal the deal.