Let me clarify, the maintenance portion of my comment was about the period immediately after browning. If you just clean it with hot water it will continue to rust. It must be cleaned with baking soda, completely scrubbed all nooks and crannies, or it will continue to rust. The nice thing about this process, from my experience, is that it is much less time consuming than rust bluing/browning and much less finicky than Belgian bluing. And it's much easier to set up. No tanks, no boilers etc...