I have tried those washable pencils, the erasable pencils, the brush-out chalk, the tailor's chalk and even the water soluable markers and they all come out fine...before I do the quilting. But once that needle and thread cover the marks, there's a trace amount still seen of the marking tool, especially on the lighter fabrics, no matter what I try. (Don't worry, for the most part I try this out on scrap fabric--it's only affected two quilts). So, my question is, besides a Hela marker, is there anything out there that's foolproof for any of you??