For the bedroom doors, I tried a much easier, efficient, and economical process: I created panels and hot-glued them to the 7.5-foot panels.
Just pull a thread. If the fabric is loomed straight, you end up with straight lines. This is relatively easy with a coarse weave, but it takes a bit more time than writing the sentence.
This bottom photo shows an uncovered door. I have only this one left to do.
I steam-ironed the burlap, and I used a loose stitch around the edges to create a neat edge line.
I would not recommend this in a child's room or for anyone who is rough. I slide the doors gently on the tracks, using only the handles or the raised edges.