I heard about this trick from my hairdresser years ago. They use it all the time when color gets on their clothes from coloring customers hair. In fact it will also work on leather (probably not Kooba naked leather though) but you have to make sure the finish will take it. I have used it before on removing ink marks from some leather bags. But again, you have to make sure of the finish. The heavier cowhide bags I did were tough and some can take it provided they don't have a special finish. As far as damaging the lining, I have used it on a lot of fabrics and it never discolored.
Congrats on a wonderful job on the Lucy!!
Congrats on a wonderful job on the Lucy!!