MoonSong
Rules-lawyering drama queen but not a munchkin
Only so much.I'd say that control is better than through stock sites or drifting through freely licensed existing art.
There is a step between the inked -or even just penciled- art and the actual shading/rendering. It is placing the raw color on the canvas so that you can select and mask more easily, and of course have the base color. This part is time consuming and prone to errors -many times this is done by one or more assistants-.I am not sure I get it, but if it's correcting little defect in an artwork, there are tool that are doing great in this domain. Can you describe your needs?