Why do you ask, if you know already?
Good point, I hadn't thought about wiper seals. I was just assuming airspring seals.I'm assuming you're talking about the dust wiper seal right? I don't think it's critical. My last couple Fox forks didn't have grease on the wiper seals and they were fine and felt good. I added some when I did pull the lowers off though.
You could always get some of that lubricant oil specifically for wiper seals if you're worried.
I agree. When I put grease on the dust seals, I usually end up thinking "I'm not sure this will make a difference, but everyone else does it so I will."...old Marzocchi forks which had a secondary oil seal rather than a foam ring really needed to be packed with grease. Most air forks now just have the dust seal and foam ring, not sure how long the grease stays beneficial before it's diluted.