I have used two layers of flannel before inplace of batting and backing.
If it's for a baby, wouldn't flannel be softer than corduroy?
My oldest son had a favorite quilt that my Step-mom made and everytime it was washed, I had to go over it with needle and thread to repair the seams. I highly recommend some type of stitch to cover the seams with. A lot of people like to used a zig zag stitch over the seams. Helps with fraying when washing.
Would love to see a picture when you are finished.