Vitamin- and mineral-rich potato is another vegetable which is great for skin health and healing. Use the juice of a fresh organic potato to fade acne and pimple scars by cutting off a few thin slices and applying them directly to affected areas. Alternately, you can cut thicker slices and apply the juice by massaging them over scars. For best results, leave potato juice on your skin for at least fifteen minutes before rinsing off with warm water. You can do this up to once per day.