If yours turn out to be anything like those I had (and some others here), the extraction and installation will be major tasks. There are new bushes out there that are a couple thou too big. Mine were, and I ended up honing the inside of the swingarm to approach a fit. Even then, using 3/4" nuts on all-thread rod and a very big breaker bar to squeeze them into the swingarm, it was a monster, sweat and curse-filled job. Had I known better, I would have tried to machine the bushes to a closer press fit. Remember, after powder coating, I doubt you will want to heat the swingarm to expand its I.D. and you won't have the means to freeze the bushes. Even if you could do both those things, it is doubtful you could maintain them long enough to squeeze in the bushes. One reason I'm saying this is to warn that you really must keep all powder coating out of the the I.D. If I'm reading John correctly, his first suggestion is to run a rod through the swingarm and close the ends with washers. This sounds the best. I think the foil would allow in traces of powder and that would scare me.
Finally, if it was mine to do, and the existing bushes were good, and I was not building concourse, and knowing what I went through the first time, I would have a major decisison to make regarding keeping the existing bushes and spray-painting the swingarm.
Richard L.