Get you some Oxiclean powder and put about 3 or 4 big scoops full in your washing machine and let the quilt soak for 3 or 4 hours at least then add soap to the oxiclean water and wash as usual rinsing at least twice and then air dry or machine dry if the marks are gone and they should be, if not repeat and soak longer like overnight maybe and then wash and rinse twice again. Hope this helps, I add Oxiclean to my regular wash and find it helps removing stains etc much better than soap alone,