Do your oven racks scrape enamel off the bottom of Le Creuset?
I try to be careful and not slide my Le Creuset across anything, but somehow my French Oven is showing tiny enamel scrapes on the bottoms.
It could also be from rough cast iron grates on the cook top. I'm the same way about my cookware. Even though I know it's not realistic I like to keep it looking new if possible. I wonder if it's possible to use a silicone silicone sheet they use for sheet pans between the oven rack and the cookware. I would be afraid it would melt the silicone though because of the way cast iron retains heat.
I have a glass top electric oven and I have been careful to keep the bottom edges of the dutch oven within the outer rough raised edge of each burner. I suppose it could have slided over one briefly though as those glass tops are slick. I still think it happened in the oven on the oven racks. They are heavy pots afterall, and sometimes difficult to lift straight up and set straight down again in a hot oven.
Unfortunately, these things are probably bound to happen sooner or later. In my case, it has not happened and mine is not a Le Cresuet, but I also don't use the electric oven very often for my enameled cast iron Dutch Oven -- except for making no knead bread. I am actually pretty rough with my Dutch Oven because it get really hot for the no knead bread, and I have to work through every steps very quickly.