I have enjoyed your diary for this one. I'm not familiar with mtn Australia, where does that come from?. I have shied away from acrylic finishes as I was worried about their hardness. I have painted a couple of cars with acrylic and found the finish to be easily damaged. That's why I have been using polyurethane. But I might be out of date with my info. Poly takes forever to cure and is more difficult to buff, but seems hard wearing.