title: Erase a path in paper.js?
body: <p>I basically want to create a new path with the canvas globalCompositeOperation set to 'destination-out'. Is this possible? If so, how?</p>
  
  <p>I noticed that Item has a blendMode property: <a href="http://paperjs.org/reference/item#blendmode" rel="nofollow">http://paperjs.org/reference/item#blendmode</a>, but trying the different values does not provide the desired effect.</p>