I'm working on a project using K1C2's "Marco Polo". It's beautiful yarn, but the nylon sheathing over the cotton cords is actually knitted, itself, and unsurprisingly wants to frog itself anytime there's a cut in the yarn!

I've had to avoid changing skeins anywhere in the middle of a row, and I'm trying to figure out how best to sew the seams, my usual plan of weaving in the ends, and sewing the seams won't work, since the cut ends will leave ugly unravelling ends of nylon in the body of my sweater.

Current thoughts:

1) try using a product like "fray-check" on the cut ends and proceeding "as usual"
2) sew the seams with a sewing machine or serger to bind the edges tightly and then carefully cut the hanging tails
3) something else I haven't thought of yet!

Thanks in advance for any advice!

Try pulling the center cord out a bit & cutting it shorter than the outer cage, then pull the cage back over the cord and tie a very tight overhand knot snugged right up against the cord. Trim the cage off really close to the knot. The knot should stop the outer cage from ravelling, and pulling it out over the center cord should keep it from being too bulky.

I have no idea what this yarn is like, but if it is nylon, then singeing may well work. Practise on a scrap first.

Get a steady flame like a candle or a gas lighter, and have a bowl water handy. Grip the yarn with a wooden clothespeg [clothespin] pair of tweezers and briefly hold it in the flame. Immediately plung the singed end into the water and you never know your luck, it might just provide the desired result.

Good luck, John