I've tried many one step products. I've settled on one, and it's my go to product just about every single day at my shop. Unfortunately, you can't buy it at Autogeek. But, it's worth mentioning anyways. It's by Malco, and it's called Glaze II. Love it.
Strange thing about it, is that you have to know how to use it. The directions on the back are pretty much useless to me. I spread it on to the whole vehicle (after clay of course). Then, let it dry and buff it off. I use a Makita, and let the pad rip at about 2500 rpm. Sounds crazy, but you wouldn't believe how simple it is to get fantastic one step results with this method. No swirls, no holograms, just a nice clean finish. It does about 50% paint correction in the process (mainly because of the rotary).
With a quick coat of wax on top of that, it really looks good. You do need some rotary skills to pull this off. But if you can move quick with a rotary, you're literally done in 20 minutes...and that's including applying the product. I've never seen a product that allows this quick of a machine buff, and still get great results. :dblthumb2: