Has anyone tried or thought about Teflon coating a cage for the purpose of reduced sticking and low friction.
Sounds plausible! I don't know how Teflon is applied. I had my 1941 Ithaca shotgun reblued with the new type of bluing (available in many colors) and the coating is a lot like hard Teflon.
I have nor would I ever try and pull out of it, but as a grower I have to apply some form of lube daily or else it gets extremely uncomfortable when I start growing and it sticks. Ideally I want a PA but I am not sure that my wife would allow it at this point, maybe when she grows a little more as a key holder and makes it a lifestyle instead of long term sex play.
Depends on the device your wearing I guess but if something like 317L or the Ti I work with I cannot see the advantage of a Teflon coating over the standard material IMHO. I have never ever used any lube on any device btw.