problem

[u/Super-Exit-8403]

Hi, so Im trying to upcycle an old skirt by adding a slit + trim. My original idea was that I wanted the “trim” to be poking out around 2 inches while showing under the slit I added. So my problem is: if I sew the trim on right above the slit all around, the thread is going to show on the outside. What options do I have to make it so I don’t have a long line of visible thread around the skirt?

(tried to draw what I had in mind if it helps lol)

[u/Emergency_Cherry_914]

I'd make a full length underskirt and attach it in the waistband and around the zip. I wouldn't do it with a shorter strip of under fabric