I am doing a piece that requires precise ... well, ok, I guess that's a stupid way to begin because all quilt making has to be precise. I'm new to machine quilting and I have to be able to see the lines I'm sewing clearly because I'm doing curved piecing. I looked at my box of marking pencils and came up cold. I have tried a bunch and have been unimpressed. Before I started quilting I did lots of other art so I have charcoal pencils (white and black) and pastel pencils so I started using one of those. But then I got nervous. I guess I could do a laundry test but meanwhile, has anyone ever tried using these kinds of pencils? because they DO make a clear precise line ... Also, what's your fave marking method?