I just resurrected a Panavise for holding circuit boards. The thing was
well worn and felt like it was held together with sand. All the
sliding/locking parts were real rough. Tore it apart, filed and then steel
brushed the galled surfaces, wiped out the black dust and put it back
together.

It's not really a hard wearing machine, so I just went ahead and used a
small amount of aluminum+copper never seize as libricant where the die
cast zinc rubs on aluminum and steel parts. It's no big deal to redo the
next time. The thread for the thumbscrew that locks everyting needed to be
chased with a tap but it's all butter smooth now and everything locks
tight.

What though is a suggested lubricant between such metals that do in fact
quickly gall like zinc on steel or aluminum?