I had some laying around and I heard that it works good to clean exterior trim (plastics etc). I wiped with Eraser afterwards if that makes any difference, and the plastic was pretty grey and faded by that point anyway.
Well besides the fact that I shouldn't have used the Prestine clean on my plastics, the fact remains that PERL has not bonded to a single surface that I have applied it to. Perhaps I got a bad bottle of the stuff?