1) Don't waste time trying to undo any bolts...just get a grinder/cutoff wheel and cut those suckers off
2) The pressed in rubber bushings can be easily removed if you drill through the rubber several times around
3) The leftover metal sleeves from the rubber bushings can be removed with a hacksaw cut and a bit of prying with a screwdriver
4) You can buy sheets of teflon very easily
For my restoration I removed the springs, split apart the leaves, sandblasted, and painted them up with POR-15. I decided to make custom spacers between the leaves using some 1/16" thick teflon sheets. You can see the results in the pictures below. Next step...painting the frame and re-installing.
BEFORE:
AFTER:

