Just did this job at the weekend.
It wasn't that hard really. Once you've removed the leaf spring from the car you have to undo 2 metal clasps one at each end and a 17mm nut in the middle then it all comes apart.
Despite only being on the car for about 2 months from new, quite a bit of rust had started and wear was evident in the nylon layers between the leaves from running dry and un-lubricated.
So I then sanded down each and every metal leaf with a palm sander with a fine grit paper until all the surface rust had gone and it was completely smooth and frictionless and then applied a very generous helping of this "waterpump grease". I hadn't come across this stuff before but its more like a wax than a grease its so thick. In fact it resembles ear wax! Next took the nylon layers and gave them a very good scrub till they were clean and then greased them too. Then put it all back together and greased all outer metal surfaces to prevent rust.
When you tighten the main nut back up all your excess grease squidges out, and then finally I wrapped the entire leaf spring tightly in this "Denso" tape, which is like a thick fabric again soaked in its own water repellent grease.
Here is the leaf spring just before refitting it to the car.
If you wish to do this job it takes about 2 hours or so to remove the spring, dismantle it, sand and clean it all, grease it, rebuild it, wrap it and refit it to the car.
I got the Denso tape from Jewsons, and the Waterpump grease from Opie oils.
The spring seems to have more movement and bounce now that there is less friction from within it, and its good that it's protected from rust now. Also its good to know that the bumps in the road are now being absorbed by the leaf spring and not my backside!
