I have been using Murad Intensive C, Sun Block, 2% Hydroquinon so far the Lightening process has been SLOW. I decided to try a stringer regimen I purchased TCA5%, 4% Hydroquinone. I Pretreated the area on my upper lip with AHA/BHA Cleanser for 5 days then applied 5 layers of TCA5%. The next morning I moisturized my upper applying avoided going outside but when I did I applied Sunblock every 2 hours. It's the 5th day after My TCA 5% Can I do another one in 2 days? (Photos Added)