I buffed the one I had on my hood out. Didn't take any effort. It just disappeared. Granted my was pretty miniscule, but I'm happy. I couldn't go to Bear Mt. so I took my finish down to the clear coat, clay barred the entire X5, and glazed it. Now its time for carnuba.
My impression of the Ca. Blade, well I still had to use a synthetic chamois. Its seemed to do OK, but nothing to jump up and down about.