Thanks for your replies, particularly the orbital sander - I was going to attack the decks with that very beast!

I have decided to go with the NorGlass system (Aussie company and a helpful rep in Melbourne). I can spray on both the undercoat and top coat for a nice finish. Paint stripper will sort out the small patches of original varnish that remain on the decks and epoxy filler for the nasty bits.

If any one is interested I might put up some progress pics.

I have printed the entry form for the Sauna Sale in June and stuck it on the fridge as a 'dangled carrot' to get the boat finished...

Thanks all and see you on the water.