Found this testimony on the Earth Clinic Folk remedy sight. Of course you might not want to use all the recommendations she says, like the retin-A cream, etc. But the Iodine part sounds good:

IODINE

[YEA] 02/26/2007: Diane from Chesapeake, VA writes: "I use tincture of Iodine (everyday) on skin ulcers which refuse to heal. Sometimes I apply Iodine 2 to 3 times a day. I never miss a day when treating squamous cell carcinoma. The area being treated by the tincture of iodine often becomes very sensitive or itchy...don't discontinue the iodine...keep applying iodine on the ulcer. The itchy skin will scab up...it's just the healing process. Scrape off the skin if it again develops a white flaky patch or a brown scab...then, apply more iodine. Use the iodine for at least one to two months until the skin ulcer has completely disappeared. Then, use Retin-A cream to complete the skin rejuvenation process. Use Palm Fruit Oil along with the iodine to promote deep healing and along with sun block to prevent future skin damage. The ulcer patches have developed on my hands and lower arms. One skin damaged area shows my skin separating on crease lines on top of my wrist. The day after I applied the tincture of iodine to the separating skin, the crease lines showed signs of healing, as blood circulation appeared in the area. The areas I treat are all about the size of a quarter, which is larger than the freckle-sized spot. I figure the underlying skin damage takes in a larger area and it may only show up on the skin as a small freckle-sized spot. Last, everyone will ask you why you are using iodine on your skin...it's orange...it's sooo old fashioned. Don't let the embarrassment of orangey skin stop your self-treatment...it beats having a doctor remove the cancer and leaving you with holes where the carcinoma or melanoma used to be. I use this treatment on all skin problems, to include possible melanoma. In addition to the topical treatment, I plan to add a daily dose of Lugol's Iodine in my drinking water. I want to treat all cancers and other health problems from within. I have red hair and white skin with lots of freckles, and I am very sun sensitive. I have been terribly burned year after year while growing up in California. I am now 56 years old, and the skin cancer is just starting to appear. That's why I feel it necessary to add the Lugol's Iodine daily to my drinking water."