Just to keep this thread on track, I scrub unpeeled potatoes with a vegetable brush before baking, then eat the whole thing, skin and all. My Irish roots I guess, but there is fiber in the skin.
Hand scrub before baking . . . and when we do a New England dinner, pot roast, etc. we always leave the peelings on the carrots and potatoes . . . less work, more flavorful.