Well yes, I do, but not as often as the outer ones. Reason is, the outer rods collect much more dirt than the inner ones, I believe cause of a kind of chimney effect the leads the warm air from the plattform around the outer rods.
I know that bronze bushings need not to be greased, however, if you ask 5 experts you get 6 opinions :)
According to my experience it is a good idea to keep the rods clean, and that can be done by removing the old grease and apply new. Just a bit. Dont choke the rod.
Certanly bronze bushings need not to be greased when they are enclosed or operate in an environment where dust an dirt is no factor.
But even if I do reduce the lifespan of the bushings by a few percent, I guess I have to live with that, cause it makes no sense to me to trade lifespan with sloppy prints.