I was reading on the Vignette Hexagon Quilt blog that one of the team members there uses the sewline glue pen for basting her hexagons. I'm intrigued. I can see how that would make the basting process so much faster, but is it safe for the fabric? Does it completely wash out? How about taking the papers out later is that an issue? So I'm asking the quilters out there have you used this product? Does it work well? Have any issues with it?