I got this tattoo6x2 about 2 weeks ago. The artist did a bad job. What was supposed to be a happy experience ended up being a disappointment! I was lucky to find a reputable artist for cover up job but he told me I have to lighten it up first. The tat is on my rib. It's in black ink. How long do I have to wait to do a laser treatment and how many sessions do I need to make it light? I have fair skin. Thank you so much for your help!