Jeff,
When I had the theater chairs built, I had them spec out the same material used on the factory couches (Villa ultra "pleather"

)
The only problem I have had is two failed power bricks. The first set was extremely sensitive to MSW inverter power. I have since replaced inverter with a pure sine wave version, and have had zero problems.
The only maintenance needed is a twice yearly squirt of silicon lubricant in the track/joints.
Just an FYI for boondocking the standard power bricks draw a surprising amount of power even at idle.