Hydraulic lifters - are these good?

Hello there everyone. These are a set of Hughes 5001 lifters. Bought them a little over a year ago. Was going over them and noticed one of them has some marks on its face (first photo) and another has a spec of rust on its face (second picture). All of them have some very light rust on the body like shown on the third picture.

I have never built an engine in my life and this is the first set of unused lifters I have seen up close. I am aware the rust is due to being stored for so long, so that’s on me. But regarding the lifter with marks on its face, is it useable or not? And the rust, will it scotchbrite off or should I get another set of lifters? I have no problem getting another set, but I wouldn’t want to throw these away if the can still be used.

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