Hi, My name is Darren and I worked in the stone industry for awhile and found it is very difficult to do what you are needing. Try mixing baking soda and small amounts of water until you have a thick paste (more to the dry side). Spread the paste over the stain 1/4" - 1/2" thick then cover with plastic wrap. Let it sit for 24 hours then check for results. You may have to do this more then once. With granite being one of the hardest stones the chances of the stain coming out totally are not great but it is possible. If this does not work e-mail me directly at and I will direct you to other alternatives.