I will be receiving my '23 Forester Sport in the next 2 weeks. The dealer has Permaplate Rustguard and Soundguard option available and I'm wondering if anyone has any experience with these and whether they are worth it. I'm in northcentral Wisconsin, so they salt and spray the roads. Also, could this have some long lasting affect on the vehicle? Someone on Reddit commented that it damages the vehicle. It was a different, but similar product. They didn't elaborate. Any thoughts or experiences appreciated.