With black or any other color sub- stained leather when dip with egg , this is not easy to leave marks ; black child is not to say the other word with the kind of leather black marking pen into black color , then coated with a egg layer , then grinding fear then coated with a layer of colorless nail polish , not a closer look does not come out , huh, huh , I used this way repaired shoes. By the way, if solidification is not good suggestion with a hair dryer to blow . & Nbsp;