I just recently did a crayola quilt--you color with crayons and iron to set. In an area I pressed too long and left a scorch thru the paper towel. I used a paste of oxyclean & water on the scorch, let it sit, and rinsed. The scorch was removed and so was some of the 'set crayon' that I had to re-color. if the crayon was removed....give a try.