All I can add is get out of the habit of tapping your spoons and tongs on the edge to clean them off.
Remember: You're a unique individual...just like everybody else.
For what it's worth, fine steel wool (0000,000) will clean burnt-on food from a Le Creuset without scratching the finish. Brillo pads work too, but generic steel wool is cheaper.
i've tapped various tools on the edge of my le cru. wooden spoons mostly, but the occasional metal tool. i cant tell if i have done any damage. i figure the edge will get "seasoned" anyways. if this beast cant handle a metal tool scraping, i dont want it...it is surviving the hell i put it thru so far. looks like krap..but still works great.
i'll replace it one day with a new shiny one and relegate the old one for bread and deep fry duties..one day.