I agree with terrors, the paint should come off the components pretty easily. The frame will be harder, especially since the original paint may not be too solid. I think using something mild and testing your methods on an inconspicuous place first is a good idea!

As for the year, guesswork is fun and all, but the foolproof way to know is to send a request with the serial number to Marinoni (email on their website). They will tell you when it was made, and what tubing they used.

Regardless of the colour, Marinoni bikes ride really well. You'll love it!