Z-AIO wont remove swirls. Z-PC is designed to do so if you have a machine. I ended up using Adams products to actually remove swirls and have been happy with it.
I was just reading your write-up on Zaino products and had a question... Have you ever tried using Z-PC or Z-AIO for removing swirls? I have a black car with swirls and I'd like to do my best at removing them.