I used the 'Hard Shell' Turtle wax. I guess it's their sealant product. It's green slimy goo which went on great but was kind of tough to get off. Overall the final depth is amazing, much better than meguiars that I've been using.
I like Optimum, I have OC and OP and they both work great, I recommend them. I only bench 325 . Where in mass are you from?