Yes, the OP is talking about removing the black gunk from the negative side, not lifting the emulsion. I have not done it myself, but several students used gel bleach for this (and also did emulsion lifts - kind of weird with the Fuji) in the experimental photo class for which I T.A. It works, though I cannot say I have seen a "standard" optical print from the negs, as these students were not aiming for them. There is at least one good online article about it that the students used as a source.
If you are after "standard" results, keep in mind that shooting "actual" color sheet film and having it processed is not much more expensive (about $5 - $6 per sheet total cost, or less if you use Samy's Santa Barbara).