If they are real MARKS and not scratches,(that are like indented into the head) then I strongy reccomend Rubbing Alchohol. Isopropyl or something like that. I recently tried it on my Felicity's white scuff marks, and it works like a charm! They came off immediately, and I was very happy. If you try it and they do come out, be sure to wipe of the alchohol from the head immediatly as I don't know if it will do anything. Good luck!