As crazy as it sounds, try hair spray. To be safe try it in an out of the way spot first to make sure it will not harm the material. I use that word because Z06 seat material is not real leather. Some years back, I got some blue jean ink on my leather seat on my Lexus. I tried everything. I went to a leather shop and they told be to try hair spray. It worked like a champ with no harm to the leather.
