looking at the irregular pattern of the scratches, my guess would be that they were stored in such a way that some surface rust developed, which someone removed with a bit if sandpaper. do you know any of the history of these, is that a possibility?
the scratches are so minor that as long as the hardened surface is intact, they're good to use. the top one looks ok. on the bottom one at about 11 on the clock, there's an area where it's hard to see if that's shadow/glare, or worn-through surfacing.
good point from bryanj: check for rocker shaft wear.