I have. I am natural medium blonde but for years went dark as a teenager. First went back to blonde by a professional, but went back dark 3 years later for a couple months, then decided I liked the blonde more. So I used a color stripper, might have been Color Oops, can't remember, but I was very meticulous about it. Then put a light blonde on. Next time I went to my hair salon, the girl said I did an amazing job on my own. I was a little nervous about stripping it, but in the end, it was better to strip it once than try re-dying it multiple times to get it right. My hair didn't feel bad afterwards.