I've always applied Scotchguard when I take delivery of a new car. A couple of years ago I switched from Scotchguard to "303 High Tech Fabric Guard" which works about the same, as far as I can tell.want to take care of my new car. Anybody have any knowledge on scotchguarding mats and carpet? Good, or bad experience? Picked up a bottle of Auto Protector Scotchguard on the way home...