I am still "battling" with the sunroom dressage horse! I disliked the look of his mane and forelock running together (couldn't put my finger on it, it just wasn't right). So I thought I would just paint over that section and start again...HA! Yellow doesn't cover black very well, even if you seal it with gesso! Now I am thinking I may just throw some "stray hairs" in there and see how it will look.
If you look close at the photo, between his ears, you can see where I have attempted a cover up!