Leaf springs live a hard life under your 4x4 ... If you do not want to use Teflon wear pads, you could use a special graphite paint that reduces friction between each leaf in the spring pack.

But that's not what motivated Nissan to create a pure-electric Leaf EV with paint that glows in the dark. It works like this: the Leaf is covered in a spray-applied coating that absorbs UV rays ...