Pete,
Yea, based on the picture, I'd say some more primer needs to come off, but it's tough to tell unless you're there. Iv'e used silver, gray, bronze and gold blocking coats. It kinda depends on the base color you're planning to use. When white, I'd probably use gray. But if I was using red as a trim, I'd probably use bronze or gold since a certain amount of the tone will come through unless you lay the white on like motar.