If you're interested to do Nail Marbling, go to Nihrida's Blog for video tutorial. For pictorial tutorials, go to Creativeten or Oceasia.
I intend to try it when I have some spare time, and when MIL isn't around - in case I make a big mess, so as not to upset her. She's extra-super obsessed with tidiness, a drop of spilled plain water on the table could freak her out... I miss having my own place. Sigh. :(