Yep. We had graphite gel and spray for our pinewood derby axles in Boy Scouts.

Same here -- graphite lubricant was the standard stuff.

A locksmith tried to fix our sticking front door lock with a bit of graphite spray, which I hadn't seen before.

Scribble a pencil on a piece of paper for a while, fold it in half, blow the dust into the lock and run the key in and out a few times. Works like a charm.