I wonder what did that to the ring. Soap helps make a zipper run more smoothly. I don't like to use polish ever. I consider Blackrocks to be a finisher so I like to make sure the leather is moisturized sufficiently before I use it. However, I don't think there is any problem with using Blackrocks and then moisturizing more later. It's just that Blackrocks has some wax in it which I think would seal the leather and make it less likely to absorb moisturizer. I've never used Apple. I think there are moisturizers that work better on seriously dry leather.
The bag is probably a convertible clutch 9635, if it is about 11 x 7 x 2 1/2, and doesn't have a back pocket. There was a dark gray color. The easiest way to tell the original color is to look on the most protected part of the bag, such as inside the front slip pocket.