I did both. Once I sewed them I did attempt to finger press open to see how they looked but ultimately I iron pressed them, no steam.
I'm wondering too, since these are all precut scraps. I spent a month (on and off) cutting up a ton of fabric into strips and multiple sizes of squares, that there was no attention paid to the orientation of the shelvages, so that may account for some of the variations.
My knowledge (and lack of!) is more from reading than actual hands on. This is my third attempt at a top in 2 1/2 years. The other two aren't finished, but I keep tryin' and buyin'! :lol: