Well I had another look and the new hinges are thicker than my old ones and the pin/pin hole/pin surround is slightly larger in diameter too.
So I dismantled my old hinges, one was easy the other took quite some pounding with a heavy hammer and drift! Minor modifications were made to the pin before re-inserting and the spacer washers were renewed.
Once apart I stripped off the old paint and polished the up on the buffing wheel, initially to remove the rust and then to bring to a shine. They are not in perfect condition (probably from manufacture) but are pretty good once cleaned up.
Below are some photos:
Photo 1: Before Photo 2: Comparing to the polished stainless steel new ones Photo 3: The old ones all polished up and re-installed.
Sorry about the quality of the photos - used my phone.
In all about 4 hours work over a couple of days, to remove the old ones, install the new ones, strip and polish the old ones and then reinstall the old ones!
I've used the new stainless steel bolt set - looks quite smart.
Now for the other side, which look worse (probably as the driver side door gets more use!)...
