Ds1 returned from school yesterday with his polo shirt "decorated" by one of his classmates (as they are in reception, I'll give this boy the benefit of the doubt but knowing him, out probably was on purpose. I've washed the shirt with normal washing powder, having used the Vanish stick, but it hasn't budged. I can't bleach it as the shirt isn't white. I found the thread on how to remove felt pen from a table, but didn't know how out would work on clothes. Any ideas?