The pit does not have any magical properties. What turns the guac brown is the air. If you can keep air from touching the guac then it will stay green. The pit will keep a portion away from the air, but what is more affective is to put plastic wrap over it and push it right down onto the surface.
Denuded skin is just another way of saying that the top layer (epidermis) of skin is gone...either from friction (abrasion or tear), trauma (tape burns), or severe rashes, or from a stage II pressure ulcer.
Benign Causes. One cause of a pedunculated lesion is what is called a pyogenic granuloma. With these, a small wound on the hand can be come irritated, causing the immune system to be activated. The resulting swelling and influx of immune cells will fill the area.