Hi guys, this is my first post. So let me introduce my self. My name is Erik and I live in NJ. Recently I purchased 97 4runner. My first car ever. It's Sr5 auto with 170k but very clean. Everything works from all power windows to ac. I have basic common knowledge about cars. Let me get to the point. My fender wells are rust free and clean. But I did some research on undercoats and bed liners. I decided to get 3M PROFESSIONAL RUBBERIZED UNDERCOAT. I washed the fenders wells with water nicely. Then cleaned them with brake cleaner and some towels. Then I used a can per fender. I got the whole fender and behind the little lip where it bends. Then I did more research and I here people say that undercoat traps moisture and all that. And it chips and what not. Then people say it's good product. Although I cleaned the fenders very well. I'm scared that this will cause rust. Even though my fenders are like new. I just want to preserve the car well as it will be daily driver. I'm curious if I used and did the right thing or should I remove the rubberized undercoat and use something else. If so what to use and how to remove the undercoat ? Or should I just not worry ? Please help thank you all.