Rusty Steel Attached to Aluminum Frame

[GoElectric]

Didn't notice until recently how severely rusted the driver's side rear jack was. Guess it was acting as the anode for the whole trailer. That, and the step. Didn't notice the step because it had rusted badly under the paint. Anyway thought about replacing the jack, but it was thick enough metal to retore. Treated with Naval Jelly and Rust-oleum Primer and Paint, and painted the rest of the jacks in good shape while I was at it. Strip the step and repainted as well.