The first three photos are a black Coach glove tanned leather bag with something white on the flap, no clue as to what it is. I have cleaned with Cleaner 3.8 and rinsed with 3.0 and it stays the same. What would you advise? The last photo is a pebble leather bag I used Prep 4.4 on and the color has changed where I used the Prep. Is there any way to get the color back? Thanks for your help.