Well, yesterday I spend about 4 hours cleaning and painting the rear leaf springs. Now I know why people buy new springs.
Getting the spring packs apart took a considerable amount of time, as prying apart the spring clamps was a chore (they're pretty beefy). The rust had pushed the leaves tightly against the clamps, so I didn't have a lot of room to work. Then I spent a bunch of time pounding the clamps into U shapes (instead of the C shape that goes over top the spring), since the plastic I'm inserting might take up too much volume. It's a 12 leaf pack, so it adds up.
I burned and cut out the rubber spring bushings, which wasn't that bad considering that they were worn to the point of being mere afterthoughts. Great Basin Rovers supplied me with the greaseable poly bushings, and to save a little money I bought a set that had coarse threads. I have to re-tap the shackles, but that's about it.
All of the bolts broke as I tried to remove them, but they were going to be replaced anyway. I cleaned the loose rust and scale off with an aggressive wire wheel on my angle grinder. I left a little surface rust on (I couldn't get it all of if I tried) and painted them with Extend, followed by a thin coat of gloss black spraypaint. Hopefully the plastic will prevent the springs from getting too hot from friction, which might render the paint useless.
I'm going to let them cure for a couple days before I apply the plastic and put them back together.
Thanks to TeriAnn for posting the idea on her website (
http://www.expeditionlandrover.info/) and listing resources to get it done. Hopefully it will prevent me from having to get new springs. The last quote I got for springs (stock or parabolics) and OME shocks (including shipping) was like $1400, and we never get the free shipping offers up here.