May want to check out..
3M's Dry guidecoat, it works great, and a lot easier to use as well. It's all we use. Not to expensive either. Also saw your post on blocking, I would go ahead and reprime, I don't quite know why these products are being used, so I can't comment on how they work. If I Was doing it and your panels are like they are I probably would have sprayed some polyester primer to use for blocking, builds fast. Also for your block, you may want to look into a set of flexible blocks, kind of expnesive, but worth it. Your block with the foam base is really to soft for what your doing.