Well, I talked with Mulberry Copenhagen today, and there's not much to do.. Since the colour is oak, I will almost for sure make it worse, if I try to wash it off or take it to dryclean.
The really kind SA asked me to bring it to the store to take a look at it. She said it maybe possible to shine it up a little, but it could be expensive, though..
So I'll bring it with me when I get near the store, maybe I'm lucky
Otherwise, I'm not so sad about it. It would have been much worse, if it happened to one of my other bags. I usually use my Rockley as a diaperbag, when I'm out with my kids, and the damage is on the back of the bag..
But girls, please promise me to be careful with what you rub your oak-bags against! In case you didn't already know, that is...