I spent a few days putting on wolfgang paint sealer 3.0 it's great stuff and is more durable that a natural sealer ( canuba wax) , you can put canuba over the top for an extra shine.
I got it from www.waxit.com.au ( cheap freight and quick )
I also used nanolex glass sealer - top stuff you don't need to use your wiper blades over 40 kmh it comes straight off.
I'm trying to score a some sort of discount for all member on the waxit website.
I'll keep you posted on that one