keep a good coat of wax on the bumper constantly & clean your car more often....i'm not trying to sound like a smart*** but that's the truth. the longer they stay on your paint, the more damage they can do. i always take our car to the spray off car wash near where we live b/c it shoots out HOT water & really helps take alot of the dirt & grim off the car before i go home to wash it. makes it much easier to keep it looking good. ps.....don't you have the highly modified wrx??? i would love to see it.