Quote Originally Posted by anikin View Post
I'm afraid it's too late to redevelop. Unlike b/w film, color does not retain any silver after bleach and fix is done. Once silver is gone, there is not much you can do.
100% correct, once the silvers gone no.

There is a techniquee called looping which was used by astronomers where a colour film was developed and fixed, then washed and bleached in a rehalogenating bleach and redeveloped this built up the dyes and could be repeated a few times before finally bleching and fixing.