I use frixion pens and have no problems with them. The disappearing ink does wash out. I have no idea where I would have a quilt that would get so cold as for the marks to come back! I also use washable markers with great success. I had used a blue marker on a quilt, then ironed the seams (with steam), and the marks completely washed out! Those are the only types of marking utensils I use. But....please check your fabrics and test before using anything....there will always be one difficult fabric that won't allow it all to come out
