Got a pretty deep scratch on my palm pre... so I looked around for a scratch remover. After reading the reviews on this, a lot of people said it removes scratches from their PDA or cell phone - it sounded like it'd be exactly what I needed.When I got the product and read the instructions, it says it apparently does not work on polycarbonate (plastic) or touchscreens... the palm pre's screen is both. I tested it on the back of my phone where i have small scratches for minutes - nothing. Tried it on the front with the big scratch for minutes - nothing.Based on the reviews, I'd assume this works well on glass products.. it doesn't work on plastic products though