I have not tried this myself yet, but just signed up for a free sample of this product! Here is the link:
http://www.stainhotline.com/index.ph...115&Itemid=211
It claims to remove sharpie ink from leather. I hope that it works as advertised as I have a football with Carson Palmer that is also signed by a few other guys like Ken Dorsey who was at the same NFL combine. It would be cool to be able to remove the lesser players and have a Carson only football. Has anyone tried this product?