Regarding Chuck (g'day mate ) I wouldn't take offense at what he said as I'm sure he didn't mean any. His comments are based on his experiences, as he explained, and he can only go by what you (or anyone) writes. As you're no doubt aware the written word is often misinterpreted and causes issues on forums as it doesn't necessarily convey what the person is like (or what their abilities/capabilities are). I'm sure he is only thinking of your well-being.
Now, back to the subject matter, you can get a nice matte finish on steel by using fine grade wet and dry paper, used wet, and you can also get a nice blackened finish by heating it and dropping in oil (Linseed oil, olive oil, vegetable oil all work). Obviously heating a knife blade is not a good idea as you could destroy its temper. Another way is to use a blueing mix, as used for cold blueing firearms, no heat required (although warming the metal might help it to work better).