Hi, I’m a newbie! My daughter talked me into sewing her prom dress and we’ve purchased fabric and pattern. It is baroque satin (100% polyester) and I’m concerned about the fraying. A friend told me to use Fray-Check around the cut pieces, but won’t that be scratchy and stiff? Any other suggestions? Also, I was wondering if I press the seams open just like the pattern says, or is there special care needed here too? I have pattern weights and know not to pin through the satin. Any other suggestions I might need to know? Thanks.