We are a bit in the same boat there inux94. Sold my system as well but I don't think I'll be stuck with a core2duo for more than a month or so. My case has already arrived, my RAM will come tomorrow and my PSU, motherboard, cooler and some other stuff will arrive later this week. Still, the 680 I'm planning to get won't ship until sometime in May and it's hard to say when I'll be able to pick up a 3570k.
Anyway, tried some painting today and I have to say that it turned out pretty alright. Not sure how well the paint will hold up though.