What I use is a home built puller. Well, it doesn't pull , but breaks loose the corrosion between the brass shaft and the tin clock hand.
You have to be very careful and not touch the clock face as that will cause damage. If you look at CH-4 photo you will see that the pliers contacts the shaft just below the flange of the hand. Apply a small amount of pressure by squeezing the pliers. Do this again 180 deg from your first contact. What you want to do again is break the corrosion contact between the clock stem and the hand. Once the hand starts to move stop and use your finger nails to remove the clock hand. If you try and do this all in one step you will bend the large flange of the clock hand.
Also, I use a soft paper towel that goes around the clock stem so the clock face is protected from finger oil and also protects the face from pliers contact.
Let me know if you have any questions.