[HummerJim]

I had an older Viper system on another car. It had a sensitivity setting, but I found at it's most sensitive setting, you could still touch the car without setting off the alarm. It's very difficult to prevent keying unless you stand there and watch it. It could be a diamond ring cut, which is narrower and deeper. I had one of those on the side window of another machine. A good body shop can tell the difference, although the cost to repaint will be the same.