My understanding after looking at a ton of sea rays before I bought my 560 is that the laminate will have to be replaced. According to the factory, the cloudiness is caused by excessive humidity – typically when the boat is stored. The replacement laminate is still available through restoration marine (restorationmarine.com). There are posts on the Internet that show the replacement process. It is labor-intensive but does not appear to be too difficult.
What I can tell you with absolute certainty is that it is okay to buff/polish/protect the laminate; I do it annually on my boat and finish with a nice coat of rejex. I don’t believe it will take the cloudiness out of the laminate, but you definitely won’t hurt anything by trying. Use an orbital polisher and start with a very mild polish like shurhold buff magic. If that isn’t aggressive enough you can work your way up from there, but you’ll have to work your way back down just like you would the clearcoat on a car.
Good luck! Let us know how it turns out. I’ll be mad if it does work, because I passed up on some really nice boats because of that issue.