Hello. So I am in a dilemma. Bought a white calfskin Chanel modern chain hobo online and it has areas where it has been painted and stains. The leather is calfskin, but is missing areas where the grain lines show due to poor paint job. Also, there is a large patent leather cc on the front, which has stains. I would like to know which kit to buy to dye the bag black (leather and patent leather). I would hope to find a way to remove the old finish which was done poorly for the grain to show through. Please help!