The only marking pens that I like are the disappearing ink and the washout purple pen. The disappearing you must sew before the day is over or it will go away. I use the pounce but found if I rub a damp washcloth over the fabric first the chalk sticks better. Now I have discovered Fons and Porter glue stick holds well on the binding before stitching in the ditch.
Also use the stitch in the ditch foot since it stays put in the ditch.