You can lighten and remove scorched stains by using a damp cloth and pressing over the area using a mixture of hydrogen peroxide and a little water.
Cut an onion in half and rub over the material where the scorched stain is, then soak the material in cold water over night and rub the onion on again and launder as usual. You might need to wash the item twice to get the onion smell out but the scorched area will be gone!
