I just wanted to post about my experience with Iodine and skin cancer (basal cell carcinoma). I had surgery a few years ago on the right side of my nose to remove a bcc, it came back about 3 months ago, and i decided I'd rather not pay another $700 and go through the ordeal again if i didn't have to. So i read that some people had success with topical iodine. I applied Iodine multiple times a day for weeks, occasionally applied magnesium oil and also picked up some DMSO gel to apply over the Iodine so that it might absorb deeper and quicker, which it did appear to help. The bcc would scab over multiple times before healing.
Anyway, my bcc is currently in complete remission. I can't say whether it's gone for good, but certainly much easier and cheaper than getting cut up by the skin doc. fwiw.