When I bought my car I make the dealer aply antirust on my car. now I have a layer of anti-rust on the bottom of my doors and all the dust stick to it, making it look black. I'm looking to remove it and I thought about an engine cleaner. Now I use AG engine cleaner and I were wondering if I can use it on the bottom of my door or you guys have an other suggestion. My main worry is about the vinyl of my door.