First, before getting into the “how to” section of this article, here are some things you should NEVER use to remove ink from leather seats (regardless of what you've heard): Hairspray, nail polish remover, baby wipes, milk, toothpaste, WD-40, or household cleaners.
What takes ink off of leather?
Apply the cotton ball with rubbing alcohol onto the leather ink stain. In a circular motion, gently rub the affected area, using a circular motion. Do not scrub. You should begin to see the ink stain gradually disappear.
Is it OK to use wd40 on leather?
Keep your leather furniture looking and feeling great. Don't be nervous; you can use WD-40 to condition your leather furniture by spraying and buffing. The solution works wonders for cleaning and protecting your leather investment. Wipe away all traces of your kids' unwanted artwork.