Originally Posted by
EasyPeezy
Although I can't see any dark lines in your picture, I'll tell you what I do.
I prefer to press all my seams open. This would solve that problem.
This is what I do as well. Very rare that I don't press seams open. PP'ing is the only time that comes to mind. And I do agree with the others, once you get your batting behind your top I doubt if you'll see the seams to which you are referring.