I haven't tried the
Sonus stuff so I don't know what you oughta expect.
It *does* sound pretty mild.. but for two passes to remove 60% isn't all *that* bad. If you use a more aggressive product you'll have to be more careful and you might have to do more than one step to get a ready-to-wax finish.
FWIW, I don't spritz my pads, but rather I distrubute the polish uniformly and prime them that way.
IIRC Ford clear is considered kinda soft...so I *am* a little surprised the 4" setup doesn't correct it faster. But there are worse things than using a safe and mild product/pad combo a few times.