I use:
blue painters tape
Tailors Chalks _ pink/wht/blue
Graphite pencil
Pounce Pad and chalks
Mechanical lead pencils - only for MY using around the house quilts.. washes out but still wont use if gift giving
F&P white Mechanical Pencil
Washable Markers..
just depends on what im marking on and for what use the quilt holds..