Trusty sealey polisher, and the polish designed for the hard paint on Audi and Mercedes cars.
Use the course if you have to, then use fine all over. These things break down and get finer as you polish by machine and don't work as well by hand.
Finished with a cheap polymer glaze from Halfords - turtle wax I think.
The boat is basically new and not chalky, but with some fender damage causing matt patches. Here's a before and after of the worst bit, including a scratch - you'll have to ask Jez about that......
there's a bit of a few there that's why I was unspecific. The majority was menzerna which is what I use on my boat, but I was running short so had some of the G3 bought locally which is why you can see the pot in the picture!