i would suggest doing some big compound movements to gain all over mass, then focus in on a particular area you want to get ripped.
For example, try lat pull downs and bench press. Then once those have built some mass on your arm, choose a poart of the arm to focus on, like bicep, forarm, or tricep, and work on that (without neglecting the other areas).
i personally know most about forearm work (being a martial artist). A friend of mine has incredibly ripped forarms full of sinews and you can actually stick your finger inside a sheath of muscle - they look like bruce lees forarms. He's a skinny guy, but does a lot of specialist forearm training. if you want soem example exercises, reply back and ask.