Oh I think I've made a big, big mistake. I used a purple washable marker around a template - about 50 starfish - and it only comes PARTIALLY out with a HARD scrubbing using scads of laundry detergent, then a scrub with water again. I haven't/can't put it in the washer yet. I learned about using washable markers on this board and thought it would be great, as I have a hard time following the lines with chalk or anything light. Have I ruined the quilt?