with all metal printing - the finish and appearance of the final product is almost entirely down to the post processing.

dmls would be the best method of manufecture for someone not used to design for 3d printing as you can make almost anything.

But it will still need to be finished and polished.

have to admit how small printed metal items are finished is something I have little knowlege of and, it's on my list of things to research.

But you probably need to look at the services and ask how they finish the products as that has a much greater bearing on appearance of metal objects than the actul manufacture process.

I have never seen lines in any 3d printed object - and I carry a little pocket microscope that I use at tct shows to look at printed metal objects.
So that's not an issue.
Just smoothness and shininess :-)