I tried to do that with a La Rosee CSGM. I have one that is a lovely aqua with white and pink roses. Unfortunately it also has a border of an olive color that is about 3 or 4 inches wide and is a color I cannot wear. I took it in to H to see if they would cut the border down, preferably to a contrast hem. Alas, I was told that they will not undertake such a thing as it would modify the original design. However, they would do so if the scarf needed a repair.
I am scared to intentionally damage such a beautiful piece, but I have never worn it as is. Ugh...