I recently had the same problem trying to mark a dark maroon batiq border. I found a marking pen that worked great for me. Chalk was no good, as I hand quilt, and the chalk just doesn't stay with all that bouncing. The pen I bought is a white marker, very fine point, and is removed by ironing, although the quilting stitches covered up that line, so I did not bother ironing it. It is made by Clover, but I see no name on the package except "white marking pen-fine" I think I bought it on connecting threads web site, although I did see one in Joann's the other day. I was really pleased that I could mark the border all in one shot on a flat surface, instead of trying to mark every three inches or so as I went along. I don't know if this will help you finish your beautiful ny beauty, since the fabric you used is satin and maybe cannot be ironed. I think the price was around 6 dollars.