On my Broncos king quilt I used many different types of things to mark my stencils. The marking pens that are water soluble I might have gotten one block marked before the pen ran out. (this was a large block with intricate stenciling). First I used a pencil and for those of you that have been quilting for awhile know that is a no-no. I have learned that the hard way. After the pen, I started using those really small colored chalk. I kept having to sharpening them but they worked great for me. I won't use any thing else now that I found this.
Dingle, yes. I have used the colored chalk and I took a damp rag and it came off really easy.