As for fading of wool.

A big thing here in Indian Country is to cut up wool Pendleton blankets and sew them into all sorts of different things.

A couple years ago I bought a steering wheel cover and seat belt shoulder pads made from part of a Pendleton blanket. The shoulder pad thingies didn't work with my seat belts so I laid them out as small decorative pads on the top of my dashboard. They sit in the center of my DashMat right under the windshield.

After three years the orange color has begun to fade from the direct sunlight of Arizona. I don't have covered parking for my car at home or at work so they get a lot of sun.

I also have a jean jacket with a red and blue Pendleton wool insert in the back. I've had it for maybe ten years. It goes out a lot but has shown no sign of fading.

I'm guessing probably the only way to fade a kilt in the sun would be to lay it out under a windshield for a few years.

Ron