Best results are obtained when scar is treated as soon as possible after trauma occurs
Application of iodine (Lugol's solution) to the skin seems to regenerate skin from the bottom up (the stem cells responsible for making normal cells reside in the basal layer of the epidermis ). Eventually the old skin is sloughed off. This type of healing leaves little to no scarring. However, be aware that iodine stings royally on an open wound! It is more effective at organizing repair and doesn't sting if applied after scab has formed.
Prevents "keloid" (worm) incision scars formed after surgical procedures. Keloids do not form with adequate iodine intake and tissue levels, such as in Japan. Updegraff,H.L. Reconstructive surgery and old facial burns. JAMA 101:1138-1140, 1933. page 1139
Transdermal Magnesium Chloride
