Welcome Jamie
Duc clutches are notorious for being noisy, even against other dry clutches.
You should ignore the noise from it, cos it only means you are stationary in neutral

The only problem you should get (eventually) is that there will be wear in the clutch basket causing a lurchy feel as you let the lever out.
The up side of dry clutches is that they usually grip really well if you want to wheely
The engine lacquer is the same as all other bikes so if you want to touch it up to stop it spreading (it will cos its salt) just carefully clean off the salt with something like a small brass suede brush and brush on a couple of layers of engine lacquer from your favorite engine lacquer shop.
Lots of people forget when they clean their bikes that detergent has a shed load of salt in it, and any winter salt that gets through is then topped up when they wash and dont rinse </apron>
Belts - most people play safe and change them far more often than they need changing. If you rev the balls off it thats probably a good thing, but technically, they only need changing every 2 years, unless the bike stands in hot sunlight regularly, as heat also ages any rubber-based parts prematurely.
If you're not sure then do it, cos rubber is cheaper than metal, and it sounds as if you are due for a service anyway.
(Yes I know tey have kevlar in them, but its all held together with rubber)
Now go out and play with that midrange torque !
Phil