SuperBuick- I too have had some issues with the OCP, which I chalk up to my lack of experience with the product. I suspect you might've used a little too much and then not worked it long enough. As I understand it, with the Optimum you hardly need *any* product and if you use too much it'll take forever to break down.
FWIW I simply can't get a perfect finish on my M3 with OCP/rotary/LC white
Used with the PC/Sonus white 4" I got a pretty good finish on Audi clear (this was the middle step of a spot repair). That time I hardly used *any* product, just enough to not be "dry buffing" and I worked it forever and a day. But even then it wasn't *quite* what I wanted so I had to follow up with 1z Pro MP. Maybe I could've got it better with the OCP and a finishing pad
Heh heh, the regulars here know that I'm not a fan of products that require a lot of "mastering", so we'll see how much I struggle with the OCP. Dunno if this was of any help, but I at least wanted you to know you're not the only person who's found OCP a little problematic.