regardless of what you choose to use you need to test to make sure it will come out- some people have had luck with washable markers- others have had a problem= i always use a pencil- some people have had problems getting pencil out-
always test-then decide if this is right for this project-
what works on one project may not work so well on the next- it's important to test everytime
different fabrics seem to have different results- at different times.