Zephyr: oh, I've determined that my favourite kind of goo form is where it's like goo, but not like drippy or sticky or anything, with a slightly thicker kind of outside layer, sorta like skin in a way, making the form smoother and slightly tougher, but still soft and kinda squishy, and with a little force, still able to break through the surface and pass into or through
naturally sealing again like normal once the object isn't there anymore
Zephyr: Zephyr also has made it so her skin is specifically designed so it can resist enough pressure to allow for everyday stuff like skin would, and a little more pressure would slip past the surface

something along the lines of this: http://puu.sh/aE51W/134313a4b1.jpg