DMSO can be used in conjunction with iodine to help the iodine penetrate the skin/scar tissue better. DMSO carries the iodine into the skin structure. Never been quite sure of a best way to do that. Maybe rub iodine on first, then rub on DMSO? Dr. Wright talks about it.
http://www.tahomaclinic.com/iodide.shtml
"Keloids" are abnormally thick scars, sometimes as much as an inch thick, that can form after injury. Although anyone can get a keloid, they're more common among blacks than other ethnic groups. Rubbing SSKI into a keloid at least twice daily will ultimately flatten them down to a "normal scar", but it can take many months to a year for particularly bad ones. The treatment goes faster if SSKI is mixed "50-50" with DMSO.
DMSO - dimethyl sulfoxide, is a colorless liquid. Smells slightly of sulfur. There are two concentrations - relatively pure at 99.99%, and 70% mixed with water. The 70% is kinder to skin when used straight as a sort of liniment, but I've done okay using the 99.99% when used over SSKI in a small quantity. It feels warming. It happens that I purchased mine in 4-oz bottles from the Tahoma Clinic, but in a quick Google search I saw that other vendors carry it as well.