A Markal B-L Paintstik marker which is used in the steel industry to mark metal surfaces was left in clothes dryer which melted and stained clothes made of 78% Polyester, 18% Rayon, 4% Spandex. How can these stains be removed?

I use a mixture of a bar of Ivory soap, and Shout or Spray & Wash and some degreaser and soak it in a big bucket of real warm water over night.
Don't know how it works on colored colors or spandex rayon. I have only used it on white cotton and blue jeans.