Paper towels = a no-no on the golf cart windshield!
Once you're happy that nearly all of the scratches are out using the Novus #2, switch to the #1 for regular cleaning.
Here's a bit of info on each of the 3 products:
Novus Plastic Cleaners
Most motorcycle dealers (and other places as well) sell a product called Plexus - comes in a couple of sizes of spray cans. It's also good stuff for cleaning your golf cart windshield:
Plexus
Bill