Does anyone have any experience of removing black inking marks? My mother has kept her black east west bays in a box with her patent red east west bays but unfortunately didn't keep them in their dust bags! This morning she has taken the bags out to look at them at it would appear that the inking off the handle of the black bays has melted/transferred on to the front of the red east west. I've tried rubbing it gently with leather cleaner and it is not moving at all. I think the red bays is spazzolato. Does anyone have any suggestions to remove the marks? I've told my mum not to use anything else on it until I've consulted the experts.