The rear doors on the Jeep were getting pretty stiff and not closing properly, due to deteriorating factory hinge bushings.
Found a company in Canada called TMR Customs that machines delrin bushings for the JK for $50 (for a 4 door JK).  They showed up today, and I was anxious to get them installed.

Last weekend I took the doors off for the first time ever (abt 5years), and they were a bear to remove.  I ended up using a floor jack to lift the doors out of the hinges.  While the doors were off, I removed the hinges from the doors, sanded the bubbling factory paint off them, and then repainted using bed-liner.  Looks pretty good I think. Just have to do the bottom half of the hinges next, but that might have to wait til next spring 🙂
Anyway, this time, the doors were much easier to remove – I was able to just lift the doors off without having to resort to the floor jack 🙂
I drilled out the old metal shims and plastic bushings that were jamming up the doors with a 1/2″ drill bit, cleaned up the pins and hinges, and the new bushings pressed into place nicely.
The doors dropped back in nice and smooth, and the doors are working better than ever!