Prepare the potato skins: Prick the potatoes all over with a fork. Place on a baking sheet and bake at 425 ̊ F until crisp and easily pierced with a knife, about 1 hour. Let cool slightly.
Cut the potatoes lengthwise into quarters.
Holding each potato quarter with a kitchen towel, scoop out the flesh, leaving a 1/4-inch-thick shell.
Meanwhile, make the chorizo topping: Heat the olive oil in a small nonstick skillet over medium heat. Add the chorizo and cook, breaking up the meat with a wooden spoon, until browned and cooked through, 5 to 7 minutes. Remove to a paper towel–lined plate to drain.
Assemble the potato skins: Brush the skins on both sides with the melted butter and season with salt and pepper. Arrange skin-side up on the baking sheet. Bake until crisp, 10 to 15 minutes. Flip the potato skins and top with a thin layer of the beans, then the cheese, chorizo, olives and scallions. Bake until the cheese is melted, about 5 more minutes. Thin the sour cream with 1 to 2 tablespoons water and drizzle on top, then top with pico de gallo, cilantro, radishes, avocado and hot sauce.