Sarnie - on the light colours I dont know - but results that can be had from a Porter Cable can be stunning to say the least.
I am just the kind of person that would always be scared of using a device like this, but Im probably being overly paranoid, here is a guide on using this device - check the images further down to see just what a shine you can get on cars with one of these.
Beware though, we all know how thin the paint can be on a 350Z, so perhaps some caution should be exercised with any "cutting" compunds etc...
http://www.autopia-carcare.com/inf-port ... isher.html