I used the Zaino Bros' Z-1 and then the Z-2 to polish my Yellow SSR. It is clear-coated. I want to say that it helped some but these cars are so bright anyway its really hard to tell. Actually its suppose to get better with about three coats and I've only put one on so far. I also did not use the clay bar Z-18 or the Z-5 swirl mark/scratch remover, it just didn't need it.
You can sure tell a difference in the slickness of the finish after using the Z-2 so it must be doing something.
Probably didn't need to but I waited 30 days after the estimated paint day before I polished - to let the paint cure some. I would think most everyone is getting there SSR's after 30 days anyway.
LCC did a beautiful job with the paint - I intend to keep it that way!