I hand quilt and primarily use a mechanical pencil with #2 soft lead. Never had a problem with it washing out and it can be seen on most fabrics. For darker fabrics I have the Bohin mechanical pencil with a white lead. It works well and have not had issues with their lead washing out. I also have the Dritz chalk mechanical style pencil with the different colored chalk leads. I have not had an issues with any of these colors washing out as others said on another thread here on the board but best to test. That said, you will not get a particularly fine line with those markers. I can't tell you how many markers; pencils; chalks, etc. I have tried and still just go back to my good old mechanical #2 pencil - never need to worry about sharpening either.