I have a vintage bag I want to restore, grey / creamish color. Has some spots and stains....possibly mold spots but leather still soft and if mold is inactive. I was going to completely re stain it another color but do like the original color. Anyone used these color restoring creams? Would it likely cover spots up and is it permanent or just a temporary thing like say brown shoe polish? One I was looking at brand name something like EIDECHSE