I'm fixing up some old razors, and after the first one I did I find that if I use metal polish to clean off the gunk it lets me have a good luck at the worse damage on the blade to figure out what to do next.

On one of them, there are some pits that the "black stuff" is mostly cleaned out of. They're not on the edge of the blade, or the spine, just at different spots on the face of the hollow ground blade, and some on the tang. I don't think they would affect the performance of the blade, well certainly the tang ones wouldn't.

Is it safe for the blade to leave them and not sand them out? I assume so long as I can get any rust/black stuff out of them and I see shiny metal are they ok to not bother sanding out?