Tom,
viewtopic.php?f=8&t=6750Bottom-ish of page shows new pins and a bush fitted into the worn car side of the hinge, I have no idea where these are from.
Biggest worry is getting the pins out when they are stuck on the door end.
You'll need some force to get them out and clouting with a two pound hammer is a no-no, a lot of cars with have a bit of cracking and hence flexing and any gorilla tactics will surely lead to tears in this area.
On the back burner of my list of useful ideas is to make a tool to press out the pins, then get my old man pin to turn up some new pins and some repair sleeves for the car side of the hinge that wears, or just some sleeves and use roll pins, as these can be knocked out easily and replaced as easy as your pants.
As to replacing the whole hinge, it can be done but getting the bolts out is a feckin nightmare, as Simonsays..........you need the patience of a saint and the dexterity of a brain surgeon.
If you put your hand up the speaker hole you can just about feel the heads of the bolts, but as they are bonded they will only move an 1/8 of a turn at a time then lock up,.................so you have to go back in with them........then start again. Imagine being on the clock doing it............hours can pass.....hours..
I've done a couple, and always have something I can kick and shout at in the garage 'cos it's that mind twistingly torturous, on one I gave up and as the car was having a repaint anyway, did a naughty and cut a square in the skin and whizzed them out with the impact gun in seconds.
And you haven't even begun on getting the bonding off, cos that will take a good piece of GRP with it, more if there is cracking present, then you need to get them bonded and bolted in the correct position, they aren't just bonded straight onto the door, they are spaced away...........sorry if I'm being negative but that's the reality, people will buy hinges at £50 each but when the labour charge is six times that......
I may look at making a dummy post for alignment, but unless your hinges are falling off I'd resist trying to get them off the door........It's actually easier the worse they are,..........in a nothing ventured nothing gained way, but alignment will always be king, that's why I'd always keep it in place and reinforce.
You might luck out with a helper in your case if you only now need to get the pins that remain in the door, by perhaps the door on the bench and with a part of the vice behind the hinge somehow and drift what's left out, but your going to have to find out where Andy the painter got those repair kits from, I know they were doing them for R11/9/5, so perhaps it's those, but I'm sure they have a different set up from the factory using roll pins.
Good luck.