I’m actually using it right now. I’ve used it before with some success at 30% concentration done once a month. I’m using 50% now, because I know how the shoulder responds to it. the key is, follow the instructions, and make sure theyre good! It can work, has worked, and will continue to work, but can cause scarring if your arent careful. Always dillute the 100% TCA to a minimum of 50%. I wouldnt use any higher than that. I faded a black and grey professionally done tattoo, enough so that my laser time was cut done by probably 25%. That adds up, when you consider the TCA is inexpensive. Remember tha baking soda to cool it down, otherwise it’ll just continue to burn…..read the instructions, and read them again! There is so much spam on the internet on tattoo removal. Try this method, and be patient (and careful) with it. I’d give it 5-6 treatments to see before making a decision. The theory is simple. Most people say that it wont work, because the tattoo is below the are of the skin being treated. This is true, but its the inflammation and the bodies repleneshing of the skin that does the fading. Its no different than getting an abraision or irritation on a tattoo, and losing some of the color, just more controlled.