I'd take off the buckle holders - carefully - then remove all the bits of thread (I use a scalpel to cut, and then eyebrow tweezers, but I have been doing that sort of work 50 years or so now) and press them carefully to make them straight, then iron them onto a lightweight fusible interface so they hold together. Cut around the edge to free the strip of fabric, leaving some extra interfacing, so a tiny edge of the cloth can be folded inside itself and then the whole thing attached to the kilt properly - going through to the reinforcement which transfers the strain on the fastenings away from the wool, but not right through to the lining - hopefully that is possible.
Anne the Pleater
I presume to dictate to no man what he shall eat or drink or wherewithal he shall be clothed."
-- The Hon. Stuart Ruaidri Erskine, The Kilt & How to Wear It, 1901.
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