Warts
Not only do banana peels help eliminate warts, but they prevent their return. Simply tape (or otherwise fasten) a piece of banana peel to the wart overnight for about a week. Alternately, you can just rub the banana peel on the affected area daily. This even works for plantar warts (on the sole of the foot).
Scrapes and Scratches
Rubbing banana peel on boo-boos can help promote healing.