Before: here is my shoulder tat from 1992ish. Originally done at Tattoo America Hampton Beach NH. It was flash I picked out and asked for rainbow colored wings on. It was also a cover up of a smaller broken heart. It got old and tired looking and I didn't like how the had colors faded. (and wasn't thrilled with the original colors in the first place) I also didn't like how the left wing looked one dimensional yet the right one looked ok. 
Yesterday I had it re-done by Chris at Atlantic Studio in Rockland Maine. I think he did fabulous with what I gave him to work with.
Needless to say I am VERY pleased with the results. It isn't a tattoo I would pick out for myself today (ahh youth) but at least now I am not embarrassed to have it on my body. Kids let this be a lesson to you to always pick the colors you want in your tattoo. Not every tattoo can be fixed later on. And even those that can will have limitations. I got lucky.