But, if you're going to do it right, you'll need to take out the apron and underapron facings and edges, put the hem in, then re-do the edges. If you don't, the apron edge in particular will look odd.

Also, turn up the first deep pleat to the left of the apron about 1/2" more at the point so that the point doesn't hang below the bottom of the apron, and taper the underapron hem from the center of the underapron to the underapron edge so that the edge is about 1" shorter than the rest of the kilt. That keeps the underapron from drooping below the apron.

And, yes. Don't fold the selvedge edge over. Just turn the thing up 3", and don't cut it off.

Barb