WD 40 on Glide outs, Jacks, & Landing Gear ?

hwh recommends wd-40 or atf for cleaning the cylinders. wiping it off is part of the cleaning process. that said, those jacks belong to you. the shaft is either stainless steel or on newer jacks, nickel impregnated steel. no problem with rust.
use anything you feel will do the job. cleaning is more important than the material used.