Mac help with Paint Bucket

I’m using Twilight Render and I have several surfaces that all use the same color but I want them to have different render characteristics i.e. shinny, flat, eggshell and so on. If I duplicate that color and now I have the name “copy” and try to paint a surface no mater what I do it seems to revert back to original in the colors palette in the Colors in Model. I have only been successful at choseing a different shade of say black or white or what ever color. Editing name doesn’t change things and some times the color “color_009” becomes Material 07 or something. I’ve read SU’s tutorials on Paint Bucket but I guess I just don’t get it.