I was marking a quilt block this afternoon, I reached for my water soluble pen and instead picked up a permanent ultra fine point Sharpie. Before I even realized my mistake, I marked the quilt block... Minor as the markings were I ran for the can of hair spray and saturated the marking. I used my fingernail to gently scrape the area of the markings and after about 20 seconds the marks began to lighten... A bit more encouragement from my fingernail and the entire mark disappeared. I sprayed it with water and let it dry naturally. So far so good!!! Hope this helps someone else who may have accidentally marked with the wrong marking pen!!!