Sorry but I have only just found this thread. This is a very good tutorial on the subject but can I add that I very much agree that it makes a huge difference if the rust pitted surface is cleaned up, made as smooth as possible and painted properly before you try to get the tyre to slide over it.
Also if air pressure is used to seat the tyre bead against the rim I prefer to let the air out again once the tyre is fully seated to let the tube even out where it is stretched. It can then be reinflated with the tube in a cavity that is pretty much its final shape and size which should reduce the stress on the tube. I do this by doing the first inflation without the valve, which speeds things up, and then putting the valve in for the final inflation.
David
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