Originally Posted by
Road Fan
I don't know that I'd do anything with WD-40, I'm not sure what the benefit is.
Regarding the thread starter's question, I would definitely Proofide the topside including the skived faces. Not much, the saddle just wants a little of those oils. I also tend not to use anything other than Proofide.
WD-40 is an old remedy to stop the squeaking from the Brooks saddles with springs such as the Flyer and B67.