pbateman- I have the same issue with my Z - it's an '05 and only has 15K miles & only been in the rain a total of maybe 4-5 times. I recently did a thorough detail using Menz IP, Menz FPII, Menz Glaze FTP, Menz FMJ and P21S Wax.
I used a PC 7424 with orange pads for the Intensive Polish and...