I wouldn't waste my money on the stuff.
Back when I first got my Grizz, I'd polish it and detail it and all that, but after a while and a few bumps and scratches, you give up and just realize that if you're gonna use the machine the way it was intended, then it isn't gonna stay shiny and new forever.
Instead what you're better off doing is taking the $200 you would have spent on that clearguard crap, and put it aside to buy new plastic in a couple years to replace the stock plastic that will get torn up having fun.
My Grizzly started life in Red. After a year and a half, it looked pretty darn ragged. It had scratches all over it from being through all kinds of brush, dirt, mud (light mud), being on its side three or four times, etc, etc, etc. It was nasty. I had picked up a set of front and rear green fenders used from a shop in Louisiana... complete set for under $200. I then bought a used gas tank cover for $25 and a new rear centerpiece for $25. My Grizz has been green since late last year and even though the used plastic has a few scratches here and there, it looks tons better than it did.
So... the moral of this story is don't worry about it... scratches will happen. Just keep your eyes open for deals on used plastic.