To be honest, I don't mind scratches at all. I think they are only cosmetic!
I have seen variation but with work and wd 40 have never had a problem.
IMO, WD sucks! It only lubricates for a short time and it attracts all kinds of crap into the pivots etc.
Yeah, but it can wash away.. And, it causes all crap to build up wherever you sprayed it!