Dont get me wrong, knives should always be kept straight, clean and sharp,,,, especially sharp for safety and for helping your cuts heal quicker
currently nursing the first silly mistake in ages
Its sometimes nice to look at the knocks and dings and think "i remeber that one up north or that one in the peaks lol". If your just after giving it a bit of a dressing after a hard time out i just use very thin oil with a bit of fine wire wool
Also if you ever get some water stones then the slurry from the nagura stone is great. Which also reminds me to order one after leaving it on an island on Loch awe