I've been using school chalk forever, as I used when I had a wedding dress business, as it was easy to remove and it never left a mark, when working with wedding and bridesmaid dresses made using very expensive fabrics and also hand embellishments it had to be something that you knew you could remove. A baby toothbrush which is very soft is good for brushing away the marks.
Last edited by notmorecraft; 03-13-2015 at 11:23 PM.
Reason: Needed to amend