J made a custom punch tool like one of these. Started with a rod sized to just slide through the hole and push the pin. Then I ground down the last 1/4" of its length to a diameter which will go inside the scroll. This allow one to line it up, hold it in place while preparing to strike it with a hammer. Having the end go inside the scroll makes a huge difference. 

Jim Davis

On Jun 3, 2018, at 4:10 PM, Jim Arnott <jrasite@EONI.COM> wrote:

>> On Jun 3, 2018, at 3:16 PM, Richard Smith (Smirby) <smirby@GMAIL.COM> wrote:
>> 
>> 1. Drive the pin out that is holding the arm to the seat. This is a tough job, for a number of reasons: the pin is tight, the armrest cushions press against the pin as it comes out, the punch (5/16”) is inexact/difficult to place perfectly. I ended up using a bunch of “alternative” punch methods, but eventually got it out. [Very much welcome anyone’s “tips and tricks” on a better method to extract this pin… - anyone?]
> 
> Roll pin punches. Made for pushing roll pins around. http://a.co/9q9kiCB
> 
> Jim