It's an interesting debate, that to me is more of a turn on despite it supposed to be gross ( because it clearly isn't gross) but two beautiful women in gorgeous exquite Dundee wear covering each other in chocolate, which is not gross, always puts me in mind of a dirty protest or a bad night on the dementia ward..
The scene where she got covered (the good part) is in the climax of the movie, like 25-30 minutes before the end. But she stays "messy" during the final fight, like for 15 minutes.
She kept saying "OMG, this is so gross" and "This is so COLD" ...seems the FX/Art department people broke the first rule of sploshing: KEEP THE GUNGE WARM! ...I bet her experience of covering her head in corn syrup based fake blood would have been much better (pleasurable) if it was kept warm.