I have also wondered what people were blocking rust on with all the rust blocker talk. It sure sounds like you're doing a very thorough job. After paint you might just put a coat of wax on it to help protect from salt. I use a rust blocker (Corrosion Block for me), on steel rims, spokes, chromed stuff w/ a not very good chrome job, and various little nuts and bolts that aren't stainless.