Yeah - WD is just a "water displacer" (what do you think WD stood for?)
If you are putting something into a two-part connector (like a Weatherpack, Deustch, or Molex) you can use dielectric grease. If you are just covering a chassis ground, use Ox-Gard or something similar.
For exposed connections (like grounds,) get in the habit of automatically recoating them each time you do your vehicle inspection (which really should be every six months or so) and you'll have no trouble.
Also, when you set up your grounds, make sure to remove a patch of paint around the screw. The OEM expects that the ground you get from the screw running through the metal is enough, but I've typically had a low opinion of automotive designers (and I'm still waiting for someone to prove me wrong...)
5-90