Thanks so much.
@rottenlittleboys I used narrow wale corduroy, which wasn't that hard to work with. I've quilted with wide wale cords and that was much more challenging:
It does tend to bias and I think it helps to embrace the chaos and just decide that it's quirky.
@MareMare I ended up quilting it with blue thread and just quilting over and under the stitches on the denim. It kinda, sorta disappeared into the denim but stood out nicely over the corduroy. I also kept my lines meander-y which matched the embroidery on the denim and went with it.
Thanks for asking!