Mr.Madeline , This is what I should do, I hope my service can satisfy you.Have a great trip in your RV!

Hello OuYang! After learning your feedback, our after-sales Lily immediately worked out a solution for you. Regarding the rusting phenomenon of the chain, although our chain is made of stainless steel, this material may face the risk of rusting under extreme environmental conditions, especially when exposed to the natural environment for a long time outdoors. For this reason, we recommend that you try to gently remove the rust from the surface of the chain using a suitable tool and subsequently protect it by applying a rust inhibiting oil to minimise the possibility of rusting in the future. As for your reference to product longevity, we fully understand your concern. The lifespan of any product is affected by a number of factors, including the environment in which it is used, how often it is used, and how well it is maintained. Our products are designed to provide up to 10 to 20 years of reliable service with proper maintenance.We're here for you!