Wasabi and iodine for dark spots: I washed, then placed a dab of cheap store bought wasabi paste on the dark spots, 30 minutes later wiped it off and put a drop of 5% Lugol's over the spots and left it to dry. It stings a little. A day or two later the spots peeled off, pink underneath. Some have returned and are getting retreated. I applied wasabi all over my cleaned face. It stung and made my eyes water so I washed it off pretty quick. A day or two later my freckled face exfoliated and looked much lighter colored. I also applied green tea, crushed tomato and fresh aloe vera gel at times through all this, but the wasabi and iodine had the most dramatic effect.