I noticed these lines in my leather briefcase I made for a friend and was wondering what caused this and is there anything to worry about.Made from 6oz. veg-tan, Fiebings Pro Dye, then Leatherbalm with Atoms wax, last rubbed in some Aussie Cream.I apologize for the newbie question, I just am worried of the long term affect it might have. Thanks for helping advance, Robert
The marble look of the dye is not what I mean, it is the wrinkle look similar to stretch marks when you look closely.