I have a samll black biro stain right in the middle of a fab outdoorsy type sweatshirt. I love the sweartshirt but because its plain on the front and the stain is right in the middle, it really stands out. So far I've tried vanish, sainsbury's stain stuff, stain devil and maplins label remover. Am wondering about WD40 next but think it might be the same stuff as the label remover. What to do? What to do?