You said Sam is not a tiny baby. If he's strong enough to unavoidably bite you and draw blood, and you absolutely can't stand that, use Kevlar gloves. I used them a lot when i was rescuing iguanas of all ages.
Use your search engine to find them, for less than $10.00. They stop shear cutting, like iguanas do, but not peg-teeth. Get the sleeves too if possible. They help hold the glove on your hand.
Do you know how to clip the tiny sharp barbs at the ends of his claws? That will help a lot. Look it up on the Anapsid site.