Did not like the way the border was quilting so I ripped it out. I mark with a #5 mechanical pencil lightly but had to be removed. Shout, lightly sprayed on and with a toothbrush the marks were removed. Next I sprayed with plain water to help remove the shout. When it is dried I can mark the blue and white with the feather stencil. Think I will use a chaco yellow.
The white chalk is faintly visible but it will disappear.
I have no idea where my mind was when I was marking this but was not happy with the results.