Here is my Sunbonnet Sue (from the vintage squares) quilted and washed. I washed it because I had blue marks for the quilting all over it. It does have that old look now.
I was disappointed with how the quilting looks after the wash. I did some antique flower patterns a bit revised to fit around the Sue's. I didn't want too much quilting in the squares because the muslin is old and not a tight fabric. I didn't want to wreck it. You can see the flower pattern a little bit here, but it does not show up well at all.
On this square you can't really see it at all. The background is a busy print so that does not help on the backside either. I also didn't quilt inside the Sue's, just around them, so their dresses puff up quite a bit.
But the quilt is for me or my daughter if she wants it, so it's not going too far. I do love Sunbonnet Sue's.