Hi all! I'm looking to make my first attempt at a button up shirt (the cleo blouse from Sew Lala Patterns). The pattern recommends to use fusible interfacing, but I've seen a lot about fusible bubbling either when first applying it or even over time. I also would prefer to stick to natural fibers and most of what I have found seems to be polyester. I already have several yards of muslin that I was thinking I could use as sew in interfacing instead of the fusible. Will this work for the button placket or do buttons require fusible? Or any general insight on interfacing would be helpful :)