I here ya. Even undercoating doesn't work. It just postpones it. I even take it to Ziebart yearly and yet it's slowly rusting around the rear wheel well. Although, it has less rust than others I've seen on the road around here in the Toronto area. Quite a few years back, someone was selling something that would apply a constant voltage/charge to your car to prevent the rust from happening. Not sure what become of that. Eventually, I'll have to take it to a shop to get it done properly. I just wish Honda would make rear quarter panels that are removable and not part of the whole bloody car.