T-9 produces a waxy coating that I've found to last longer than CRC/Corrosion X-type sprays. Good for infrequent use on hidden connections and surfaces, not good for frequent use areas ... :?
You might want to check into a product called Fluid Film. Look it up on the web. I have been using it at work for about five months now and love it. We have been buying it from NAPA.