picked up a 12" superman in pretty good condition,only prob is he needs to be restrung..does anyone have any suggestions on what to use..was thinking some type of O ring just not sure what size..if anyone has done this or has suggestions pls help......also have a joker heads that seams to be smoker yellow/brown ....any way to whiten him up again...left it in bleach/water mixture...didnt help at all..is there another way?