I have used Evapo-Rust on a lot of things, and it will not harm paint, rubber, and plastic. Now, with that being said, I have seen paint come off certain areas of a part if the rust has worked its way under it. Other than that, Evapo-rust is a great product for all of our collectables. I have even thought of soaking a computer in it. Good luck on your project. Let us know how it turns out for you.