Each day after I let him settle in, I would hold him 5-15 minutes, and let him calm down for a little while in his cage. After an hour or two I would get him again, I would do this a max of 3 times a day. I would get up early in the morning when he was active to get him out as well. He was the most bitey at those times. When I woke him up, he was less likely to bite me.
It took about 4 days before I saw any changes, once I stopped wearing gardening gloves, the attitude change was almost instant. I think the previous owner probably tortured him with gardening gloves.. the poor baby.