Question about PSA guidelines....PLEASE HELP!

I have some 1954 Topps baseball cards that I recently purchased. They are very high grade, some being NRMT +. The only thing is that a few of them were wrapped with rubber bands many many years ago and have a very faint, and I mean you have to use a loupe to see it, stain on the back where the rubber band used to be. There is also a very small (about the size of a grain of salt) chip of dryrotted rubber band on the backs of some, however, there is no paper loss. My question is, how would PSA grade these cards? Any help would be appreciated.
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Dave
1957 Topps 99% 7.40 GPA
Hank Aaron Basic PSA 7-8(75%)