My old Lodge Dutch oven has been with me for many years,and the white enamel interior is beginning to show some age. I was wondering if the more expensive manufacturers enamel ware is more stain resistant over time ? I use this dutch oven to bake bread , and wonder if the high oven temps are also some cause of discoloration? The finish is still intact, just crazed with many scratch like marks. Do the other brands so this too, over time and with much wear and tear ?