Are you referring to the "uncleaned" indented areas? If so, those do not play any role in the "seal" of the heads. I would have expected them to have cleaned it up a bit better but if those areas are lower than the machined surface it won't make a difference. I would have expected to get back something cleaner though, but I was quoted $350 just for the valve job, I don't know what you paid.
Thanks Bob , in the future I will replace them with those one piece stainless pieces. I just had these heads reworked so I can make my way back home. My military service is coming to an end so I just need the car to make back with out a problem as I was having issue with my cleveland. I actually killed a few birds with one stone having the valve job done.The shop used a belt sander type surfacer, it will seal fine. Yes, there are smoother finishes on a broach or a head grinder but you'll be fine with what you have. As a matter of fact, my Australian 302C heads on my 351C look exactly the same, we purposely used the sander because we wanted to remove as little material as possible since I was fighting the compression being too high with nothing taken off the heads.
BTW, looks like you are working with a 351C as well, do yourself a favor and get new valves if any of them are original Ford valves (looks to me like they are). They're made from two pieces and the heads like to pop off on occasion, which will ruin your engine. Just a thought.