Nickel silver ferrules
I fish only bamboo rods anymore, except in the salt (rare for me).
They all have nickel silver ferrules.
As long as they join well when the rod is assembled, I do nothing. I do wipe the male down with a clean cloth after fishing.
If they are difficult to disengage, or join, I will clean the female as descibed above, being careful to not get any alcohol on the varnish.
After many, many hours astream, the joint may become a little loose, then and only then do I apply a very thin coat of beeswax to the male slide.
This will usually suffice for about a season. Then you have a couple of choices. Re-ferrule the rod or have the males electro-plated. If you do not, you're inviting a lot of trouble.
Again, I'm talking bamboo with nickel silver ferrules.
Never twist the sections when joining nickel silver ferrules.
Using nose petroleum is a matter of choice, I guess. I don't do it but you need to keep in mind that many, many thousands of fishermen did just that
over several decades. I don't think it created a serious degradation of the slide if wiped cleaned when disengaged. Probably better not to, but....
When you can arrange your affairs to go fishing, forget all the signs, homilies, advice and folklore. JUST GO.